look up any word, like fleek:
 
1.
A pen weasel is the asshole in your office that somehow accumlates everyones good writing pens. This person neve every buys a pen they always steal them.
Hey where the fuck did my pen go? My mom bought me a really good one for Christmas. Hey man just check the pen weasel I bet that asshat has it.
by pantyteamaster September 28, 2010