A Wikipedia vandal, who is notorious for placing signs which block text and replace it with Pelican Shit or some variation on that using poorly written CSS and HTML. Has over 900 sockpuupets. More can be found @ Longterm-abuse on Wikipedia.
Googling ass pus, spongebutt squarepenis and pelican shit will show most of his handiwork.
One day, I looked up something on wikipedia, and written in a colorful table at the top of the page was:

This page fucked up by
*** PELICAN SHIT PRODUCTIONS ***

Got Ass Pus?
And when I scrolled down it didn't move, so I refreshed the page until it was fixed two minutes later.
by UrbanVision5000 December 13, 2010

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Top Definition
The shit of a pelican, dumbass.
It's pretty much self explanatory: Pelican Shit.
by LSD420 July 20, 2006

The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Lotsa space for your liquids.

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The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt