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Mr. Krabs' business rival on Spongebob Squarepants. He owns a shitbox restaurant called the Chum Bucket, where he makes secret evil plans to steal the Krabby Patty formula and therefore attract business. He always fails.
Plankton

"You'll never catch me, Mr. Krabs. I went to college!"
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3
a small creature that bugs the hell outta you when you don't need his/her bullshit at the moment
SpongebobSquarepants
You bitch, you-you plankton-you just stole my formula of how to make fried chicken
by bigblack&hairy235 February 25, 2009
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4
Word used to describe utterly detestable and braindead peasant underclass. These are the slutty, often chav bitches at parties who you wish to kill slowly. However, despite appearances, there is a reason for their existence. Their sluttish antics (such as false lesbianism) distract the male equivalent of plankon, thus reducing 'competition' for the more discerning male.

Plankton are simultaneously a disease and a cure.
"This place is full of plankton"

"Yeah, lets go"
by Figure Number Five June 30, 2005
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6
A name given to people who claim to not like attention. He/She secretly loves the attention but tries to show that he/she is annoyed. Her friends try to bug her by praising her in the name of plankton, the green dude from spongebob.
Guys, we should go praise Ami. ALL HAIL PLANKTON
via giphy
by meluvoreoz1 May 27, 2018
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7
A person who bums everything and anything off of people. Also can be said instead of word bum.
hey can i plankton you ?

Dan Hegarty then gave me a stog.
by Mike Chi December 14, 2008
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