What's on your mug?

having a penis long enough, so when you go to the bathroom, your penis is submerged in the water, thus making a submarine type effect.

Dude OMG im totally submarining

By Joseph E

A motorboat that comes unexpectedly.

"Ya she had some amazing tits. I definitely submarined them."

By SarahRichmond

n. A derivative of the "motorboat" in which one places one's lips and cheeks against the vagina, then shakes the head from side to side, keeping the lips slack, so as to produce a "bu-bb-br-br-bb-bur-bu-ber" sound. (See also: motorboat)

She said she'd seen and done it all, and nothing I did could surprise her -- but then I put on my best Sean Connery and gave her the submarine.

By MSOEnunciate

A bar.

"I went into that submarine over there and got meself another wet."

By Jessica Pille

Another way of saying slut, someone who is full of seamen.

“I think she looks quite nice” “No, she’s a submarine”

By Jimbowool