1 definition by GingerJabberwocky

Top Definition

The act of two lesbians forcefully, but lovingly, inserting the knuckles and or fist in to any orifice of choosing.

Debra whispered softly to Jessica, "Wanna 'Thunder Knuckle'?" as she pumped her fist into the sky.

by GingerJabberwocky May 14, 2011