When one takes a crap in the water tank of a toilet. This is usually done as a party prank or as a method of smiting one's enemies. It's a real pain to clean out, stinks like hell, and makes the toilet flush brown for days.
by Durendal April 18, 2004

by 9kButtEater July 12, 2012

Ex. 1
Fred Cusick: Neely scores top shelf.
Ex. 2
Random Fellow: They scored top shelf, where momma keeps the peanut butter and I keep the pornos.
Fred Cusick: Neely scores top shelf.
Ex. 2
Random Fellow: They scored top shelf, where momma keeps the peanut butter and I keep the pornos.
by The Sugabear April 29, 2010

When two men engage in double penetration (DP) of a female the man in the top hole is going "top shelf".
Dude, I'm down to DP this chick with you but I'm calling top shelf all the way. I don't want your bag slapping all over me.
by nemensclubmpls March 25, 2012

by BigOBJ7 December 15, 2008

When shelfing (or shelving- i.e inserting something in your rectum, usually ecstasy for increased absorption rate) the way that one knows they have done so correctly.
Go in with your finger and curl it back over- place it on the top shelf.
Go in with your finger and curl it back over- place it on the top shelf.
Dude: Here man shelf this.
Other Dude: ...... I've never done that before.......how do i, you know, know its in the right spot.
Dude: Up and over- top shelf. (Whilst doing up and over motion with index finger.)
Other Dude: ...... I've never done that before.......how do i, you know, know its in the right spot.
Dude: Up and over- top shelf. (Whilst doing up and over motion with index finger.)
by JC, quoting Jimmy The Greek June 12, 2009

by Jacob Soltero January 11, 2012
