the rule which state that you are able to date someone 2 years older or younger (2 knuckles from the middle both ways) without consiquence
Dude1: yo last night i hooked up with this hot chick from collage
Dude2: u mean the blonde one? shes 2 years older then you!
Dude1: knuckle rule
Dude2:good point, nice job last night
Dude2: u mean the blonde one? shes 2 years older then you!
Dude1: knuckle rule
Dude2:good point, nice job last night
by Jesse Mitchell January 12, 2008
Get the knuckle rulemug. Sebastian:my fingers got well far up your pussy when i was fingering you betty
betty: i know my pussy must be a knuckle muncher
betty: i know my pussy must be a knuckle muncher
by toe licker August 17, 2010
Get the knuckle munchermug. by TroopRespecter8 July 31, 2020
Get the knuckled upmug. by pooeyhead April 11, 2014
Get the mooses knucklemug. by Uber JoKR December 8, 2016
Get the couchie knucklemug. by 1997 boy January 4, 2016
Get the duck knucklemug. 