What Does All This Betting Shit Mean?
A plain-English guide to the words bettors throw around every day: moneyline, spread, juice, no-vig, CLV, EV, units, props, steam, and everything else that makes a betting screen look harder than it needs to.
Before you bet an opinion, understand the number. Most betting mistakes start when the screen looks familiar but the price does not.
Start Here: The Bet Itself
A moneyline is the simplest bet: who wins the game. If a team is +140, a $100 bet wins $140 in profit. If a team is -140, you must risk $140 to win $100 in profit.
A spread gives one side a head start and makes the bet about margin. If a team is -3.5, it needs to win by 4 or more. If a team is +3.5, it can lose by 3 or fewer and still cover.
A total is the over/under on combined scoring. If an MLB total is 8.5, over needs 9 or more runs and under needs 8 or fewer.
A prop is a bet on something inside the game: a player's points, rebounds, hits, strikeouts, shots, yards, or touchdowns. Props are where the screen gets crowded fast.
The Price
Odds are the price of the bet. American odds use plus and minus numbers. Plus odds show how much profit a $100 bet wins. Minus odds show how much you must risk to win $100.
Juice, vig, and the book's cut all mean the same general thing: the sportsbook has a margin built into the market. That is why both sides of a normal spread might be -110 instead of even money.
Implied probability converts odds into a percentage. No-vig probability goes one step further and removes the book's built-in margin so you can read the market more cleanly.
The Market
The opening line is where the market starts. The closing line is where it ends before the game begins. The movement between those two numbers can tell you how the market reacted to money, injuries, weather, lineups, and news.
Steam is a fast move across books. It can mean respected money hit the market, but it can also mean you are late. Chasing steam after the best number is gone is one of the easiest ways to feel sharp while paying a bad price.
A stale line is a number that has not moved when the rest of the market has. Sometimes that creates opportunity. Sometimes it disappears before you can click.
The Process
EV means expected value. A +EV bet is one where the payout is better than the true chance of the bet winning. You can lose a +EV bet today and still want that same type of bet forever.
CLV means closing line value. If you bet +140 and the market closes +115, you beat the close. That does not guarantee the ticket wins, but it usually says you got a better number than late bettors.
A unit is your standard bet size. It keeps you from turning every opinion into a personal emergency. If your unit is $10, then a 2-unit bet is $20. Unit size should come from bankroll, not emotion.
The Traps
Chasing means increasing risk because you are trying to win back losses. It is usually how a normal bad day becomes a dumb bad day.
Parlays are multiple bets tied together. They can be fun, but each leg adds risk and the book's edge often stacks against you. A parlay is not automatically bad, but it should not be a bailout plan.
Trends can help, but trends without context are bait. A player hitting a prop 8 of 10 times matters less if the line moved, the role changed, or the matchup is completely different.
The KingFish Rule
Understand the number before you bet the opinion. You can like a team, a player, or a matchup and still pass because the sportsbook price is wrong.
Good betting is not about having an opinion on every game. It is about knowing when the number is worth your money and when the smartest play is doing nothing.
How to Use It
Identify the bet type: moneyline, spread, total, prop, future, or live bet.
Read the price and convert it into a rough probability.
Check whether the line moved and whether you are early or late.
Decide whether the number still makes sense after context.
Size the bet by unit, not by mood.
Common Questions
What is the difference between EV and CLV?
EV is about whether the bet is worth the price before you place it. CLV is about whether you beat the final market number after you placed it. EV is the idea; CLV is one way to check whether your process was probably sharp.
What does juice mean in betting?
Juice is the sportsbook's built-in cut. If both sides of a spread are -110, the book is charging extra on both sides instead of offering a true 50/50 price.
What does steam mean?
Steam is a fast line move across sportsbooks. It can signal respected money or important news, but chasing steam late can leave you betting the worst number on the board.
What is a stale line?
A stale line is a sportsbook number that has not moved with the rest of the market. Sometimes that creates value, but it can disappear quickly once the book updates.
What is a unit in sports betting?
A unit is your standard bet size. It keeps bet sizing consistent so one emotional game does not wreck your bankroll plan.
Notes
This guide is educational and should be paired with current odds, lineups, injury news, schedule context, and the price available at your sportsbook. It is not a pick by itself. Last updated: May 8, 2026.