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the accidental application of shit to ones knuckle while in the act of wiping ones ass.
"dude, what took you so long?" "Had a serious case of shnuckle, had to wash my hands for 5 minutes."
by The Normandy January 20, 2012
1. To cuddle, get cozy, fit perfectly together

2. A very nice kitty
I had such good shnuckles last night!
by Princess Taylor Shnuckles December 08, 2008