Usain Bolt's "dagger" game is STRONG -- and the Olympic legend proved it by bumping, grinding and thrusting away at an insane Carnival party in Trinidad & Tobago ... and TMZ Sports has the pics.
The World's Fastest Man was at Momentum nightclub during the Carnival festival last month -- and put his daggering skills on display for the crowd ... with the help of an enthusiastic young lady.
FYI -- daggering is a huge dance craze in Jamaica ... it's basically aggressive dry humping.
Bolt considers himself a dagger master -- and also busted out his moves at the airport on the same trip.
Brutus would be proud.