A breakdancing move where the back is curved outward (creating a hollow space), while balancing either on the head or on the hands.
He had a nasty hollowback in his routine.
by Neon February 05, 2005
A hollowback is when someone doesn't have a backbone. Doesn't stand up for themself.
"Damn! You busted his balls! You ain't no hollowback girl."
by catphish February 11, 2007
a crunch but with your legs behind you and balancing off of the ground
a hollowback is hard as fuck
by blazed December 09, 2004