Fucklock

When a woman tightens the muscles towards the opening of her vagina to "lock" the man's penis in place.

"She totally pulled the fucklock on me."

by Sydlesk April 29, 2010

The British Fucklock

Sexual position in which a British girl wraps her legs around her sexual partner tightly while bracing for a second male mate's attempt to blast her in the ass.

"Leanne had that dude in the british fucklock, must've been anticipating a third party!"

by The Snatch Dispatch January 31, 2009