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A dooooooooch bag who's only friend is robo tate, becuase of the hot robo sex.
Did you see sieber and robo tate do it in the middle of the street? Robo Tate had a bigger wang than sieber.
sieber by mr mister April 18, 2005

Caden Sieber 

(adjective) when your so unathletic that anything that you touch with your bare hands will end up on the floor. When one is described using this phrase, they should rethink their life choices and get back to the weight room.
Dude, how did you drop that catch? Your such a Caden Sieber!
Caden Sieber by Lil Diabetus November 9, 2021

Jenny sieber 

Oh god! She pulled a Jenny sieber! Wake her up!
Jenny sieber by Dmee November 7, 2020

Going Siberian 

When you grow your pubes to their full potential.
Jeff: Hey Chris. It looks like they're sending me to Russia for two weeks in October.

Chris: You better start growing your pubes out, man. Sounds like you'll be going Siberian for a while.

Siberian AIDS 

When your balls get really cold and start shrinking, then you have Siberian AIDS!
Bob: Oh man, it was cold outside last night during football practice.

Steve: Yeah, I think I got Siberian AIDS.
Siberian AIDS by Des87 October 11, 2016
A person with either a large nose, a bowl cut, or the ability to play the clarinet. Descendant of both the squidward and the shanth
Max looked towards the boy, and said

"God, that kid is SUCH a Seibert!"
Seibert by sluurp October 25, 2009