Master Lock

A sexual position where the woman lies on top of the man and puts her ankles behind her head. The man wraps his arms in front of the woman's legs and then behind the woman's head, giving the man total control. This position is used almost exclusively for anal sex.

I had Sally in a Master Lock last night, it was awesome!

by Djsyndrom325 October 18, 2008

Master Key Shitty Lock

A man is the master key ie his penis the woman is the lock ie her vagina.

Jan: Why is a man sleeping around is ok while a woman doing the same thing is a slut?

Bill: Master Key Shitty Lock.

Jan: what does that mean?

Bill: A Master Key Penis can open many Different locks, a Shitty Lock Vagina will open with many different keys

Jan: That's sexist.

Bill: No it is the truth.

by McOwnage August 14, 2016