one whom does not stop having sex with people; one who has had much semen(or skeet) pumped into there vagina or mouth... or butt
janelle is a fishtank, i mean shit even joey got some from her.
by marlaine May 23, 2004
rollin wit no tint.
Look! Ya boi over there smokin a j in his car, thinkin no body can see him, but dat nigga rollin fish tank.
by Lacey G. March 14, 2009
ok think about a fish tank four sides so you need four people 2 girls and 2 guys make the guys face the girls and then they have sex standing up so they make a two lines next to each other like the equels sign. now there are sides air between the people are the sides and a bottom!
man: lets fish tank all night
lady: but we need more people
man: get your roomate i 'll get mine
lady: ok

and they fish tank alllll nite long and moan

I like the wayyy u fish tank baby
by karlee furlicker July 27, 2009
A tank that is full of fish that u plug in and they become super Neilified.
"The fish tank is on!"
by Jenny February 05, 2005

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