look up any word, like dirty sanchez:
 
1.
HAIR ONLY ON THE CHIN, SIMILAR TO A HALF GOATEE.
check out that dudes sweet ball bumper.
by gregory5579 January 23, 2012
 
2.
a shock absorber for a high speed cock sucker
man your ball bumper sure is thick
by gregory5579 July 10, 2006