(typically of a person) fall suddenly, clumsily, or headlong.

Speaking to the doctor, she found out that Andrea had been hit on the head, tumbled down the stairs and had been caught in a fire.

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

have sex with.

he was tumbling a strange woman

have sexual intercourse with (someone).

perform acrobatic or gymnastic exercises, typically handsprings and somersaults in the air.

They threw themselves through the air, others tumbled , cartwheeled and bounced.