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The act of sticking ones finger or other object up another's anus in an attempt to cause discomfort.
Wow Josh was trundling someone so hard that they sharted and pooped a little.
by Bow N Arrow July 26, 2011
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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A replacement for the word Trolling in the Forums of League of Legends. a Popular Online game. Trundle is also a playable troll character in the game.
There sure are a lot of Trundles in the forums today!

Stop feeding the Trundles!

Trundling is an art. True Trundlers Trundle so well that very few people notice they are trundling in the first place.
by Mike Makoliw November 25, 2010
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