Moneyline = ML = the Winner or loser of the game. Usually there's a favorite, and an underdog, and odds associated.
+odds = extra return on your stake. For example, +200 odds means you will win 2x whatever you wager
-odds = a premium you pay for picking the favorite. For example, -200 odds means you will win 1/2 whatever you wager.
A simple way to calculate is for + odds, multiply stake by (###/100, in the case of +200/100 = multiply by 2)
For - odds divide stake by (###/100, in the case of -200 = divide by 2)
At the spread = a handicap rather than odds on a moneyline favorite. The favorite will have -points, the underdog will have +points. The winner is calculated by the final score of the game +/- the spread.
If you bet on a team +5 points, for example, just add an imaginary 5 points to that team's score at the end of the game.
Push = a tie. If the game results in a tie, or if the point spread is equal to the winning differential, both sides of the bet are refunded.
Nothing this guy said is true.