Gundlach 

A person who is a master of carrying out acts of stupidity for comedic purposes and one who doesn't care about what people think of his/her retardation but rather embraces it.

Person 1: (Takes a shit on the street)
Person 2: Hahaha, you absolute gundlach!

Gundlach by BiloGundlach21 February 14, 2018

Gundlach 

An obscure sexual maneuver, possibly involving a gerbil covered in crisco.

Want me to give you a Cleveland Steamer?

No...I'm in the mood for a Gundlach tonight.

Gundlach by Kouwe June 13, 2010