metalul

A laugh caused solely by someone else's laughter.

"If I ever zone out of a conversation and miss a joke at which everyone else laughs, I metalul so as to not seem like I wasn't paying attention."
"Even though I hadn't heard the joke that caused the people sitting behind me laugh, I couldn't help metalulling because I was so tired."

KTK

"Kill The Keg". Refers to the consumption of the remainder of a keg of beer. Killing the keg is most commonly done in fraternities; the pledge class is told to "kill the keg" in a certain amount of time.

Last night the pledge class of Fiji had to KTK.

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