lock and leak 

When you have to whiz and you're at a party or a public washroom where the lock is broken or is one of the locks where you don't know if its locked or not. Which puts your dick/twat on display while you're pissing to whoever opens the door to piss as well. Happens especially on toilets that don't face the door.

So you b(lock) the door while your (leak)ing or get a buddy to block the door.

Bob:Yo Steve, the bathroom lock is retarded and I have to take a piss.
Steve: Alright got your 6 o'clock, lets lock and leak.

lock and leak by Slim Cognito October 13, 2015