(FUCK KNUCKLES) slang expression used to describe something unexpected, usually in a loud manner.****** It was just submitted and was just submitted and accepted but my phone dropped the lettet K, so it apoeared as Fuck Knucles. So sorry about that********
by Tabago's mom March 30, 2019

1. Don't be such a fuck knuckle.
2. That fuck knuckle crossed the highway without looking.
3. If you're going to be a fuck knuckle, you can piss off.
2. That fuck knuckle crossed the highway without looking.
3. If you're going to be a fuck knuckle, you can piss off.
by xxxxmints May 17, 2017

to go knuckle deep into the anal regions of the other gender while your other knuckle is 5 inches deep in their other genital region.
by Gizard XD February 28, 2017

by CurseWordGenerator2000 January 28, 2019

What a fuck-knuckle.
by #CoronaTime_420_69_51 March 24, 2020

Getting fucked while your balls are vibrating from the wavelengths of Knuckle Puck’s live performance.
by TaraWard10 November 21, 2023

by Invented that word December 10, 2024
