Bomb pot
A bomb pot is a hand where every player at the table puts in a set ante before the deal, so there's no preflop betting and everyone sees the flop together.
In a bomb pot, instead of posting blinds and betting before the flop, all players agree to throw in the same fixed amount of chips first. The cards are then dealt and the dealer immediately turns over the flop, so the action only starts from there. Because nobody has folded yet, every player at the table is in the hand and chasing one already-large pot.
It comes up most often as a fun, table-agreed twist rather than a standard rule, so you'll see it sprinkled into cash sessions or run periodically in some tournaments and home games. Everyone has to be on board, and the ante size is set in advance. Some versions deal four cards each (a Pot-Limit Omaha style bomb pot) instead of two, which makes hands even bigger.
For a beginner, the key thing to understand is that a bomb pot is high-variance: with the whole table seeing the flop, weak hands and small edges get magnified, so swings are bigger than normal. Play tighter after the flop than your excitement suggests, and lean toward hands that connect strongly with the board (top pair with a good kicker, a set, or a strong draw) rather than marginal holdings.
Example
Six players each ante 10 chips, building a 60-chip pot before any cards are dealt. The dealer spreads the flop K-7-2 and you're first to act holding K-Q, giving you top pair, so you make a value bet of 40 into the 60 to charge the five other players still in the hand.