Weeaderp 

A combination of the words weeaboo (extreme anime fan/Japanophile) and derp (stupid or ignorant person).

Basically...it's used to describe a very stupid anime extremist.

Despite what some people think, there is a bit of a difference between a weeaboo and and a weeaderp.

Normal anime fan: I like Naruto! :)

Weaboo: OMG SQUEE, I LOVE NARUTO!! SO KAWAII! (/^0^)/

Weeaderp: OMG! I luuuuuuuuuuuuuuuuuuuUV animu!!! Especially this one YAOI animu called NArUto! Cuz' every1 nos that Naruto is a yaaaoi! It is KAWAII SUGOI DESUUUU ^///0///^

Weeaderp by Teh Coon Pwns U December 6, 2010

Weederpillar 

1. A person who frequently mooches off of the weed supply of others/only comes around to hand out when/if weed will be present.
2. An explanation for the mysterious disappearance of parts of your marijuana plants.

"Hey guys! What happened to all my weed?"
"Oh I don't know, maybe a bug ate it..."
"Damn those motherfucking weederpillars!!!"

Weederpillar by Jezzebelle May 10, 2008