When you get a girl to kiss your grundle, holding back your sack & balls - but betray her at the last minute by letting them flop onto her face.
"Baby see how soft my taint is - give my grundle a kiss!"
*flop*
"You benedict grundled me!? I feel so betrayed!"
*flop*
"You benedict grundled me!? I feel so betrayed!"
by mutorcs December 13, 2009