Definitions:
fall suddenly, clumsily, or headlong

perform acrobatic feats, typically handsprings and somersaults in the air.

dry (washing) in a tumble dryer

understand the meaning or hidden implication of (a situation)

have sex with

clean (castings, gemstones, etc.) in a tumbling barrel.

a sudden or headlong fall

a handspring, somersault in the air, or other acrobatic feat.

an act or instance of having sex.

a friendly sign of recognition, acknowledgement, or interest