Explanation of Boat

A full-house in poker is made up of 5-cards, three of one-rank, and two of separate rank.

Example: KKKQQ

See the entry on Full-house for a more in depth explanation on full-houses.

Example of Boat used in a sentence -> We have the best hand now, but villain might make his boat on the river if the board pairs. 

See Also 

Full-house, Hand-rankings, Two-Pair, Turn, River

See the entry on Hand-rankings for a full breakdown of the different hand-strengths in poker.