A sexual act where, when having sex doggy-style, the man suddenly inserts his thumb into the woman's asshole and yells, "Vroom vroom!" as she tries to pull away.
I gave my girlfriend a thumb drive last night, so she punched me in the nuts and dumped me.
Working a hand job too hard with the thumb making direct contact with and collapsing the urethra. Imagine pressing out tooth paste with only your thumb on the underside of a penis with 100 stokes per minute, under the pressure of full grip.
My boy is getting surgery next week to fix the damage from that fat girl that gave him the thumb drive
AKA San Diego Stinger