1a)as to fuck someone while twilding the fingers; also known as slickery twiddlefuck, when it becomes slippery and
2)also used as an insult.
1) severe intercourse
1a) such as "man when she fucked me, she did that twiddle thing.. twiddlefucking is BOMB!"
2) such as "you stupid slickery, twiddlefuck, fucknugget, SUCK IT LIKE YOU DO AT LIFE!