JoJoTheFlyingMonkey's definitions
An EXTREMELY deep vagina. You could fit your entire arm in. Compared to the deepest part of the ocean, The mariana trench.
Guy 1: Dude, Jessica has The Mariana Trench In her pants!
Guy 2: Did your sumbarine go exploring?
Guy 1: Oh yeah!
Guy 2: Did your sumbarine go exploring?
Guy 1: Oh yeah!
by JoJoTheFlyingMonkey May 29, 2010
Get the The Mariana Trenchmug.