To push the entirety of your nose into the anus of another person.

An extreme form of brown nosing.
Matt: "Mfffmfmmffmm"
Dave: "What?"
Matt: "Mfffmmmffmm"
Dave: "You know its rude to talk and knurk at the same time"
by KnurkHerder January 11, 2013
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To cum on a fridge
"Oooohhhh nooooo im knurking"
"Its knurking time"
"Time to take the knurk 2"
"Got Knurk?"
"Knurken time"
by Knurkskihonk June 25, 2022
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