Top Definition
When a woman with big knockers is at a concert and pulls out her tits. May also describe a woman rocking out with her tits out while listening to a song. Similar to rock out with your cock out.
This babe with huge knockers rocked out with her knockers out at the Slayer show!

I want to see all you girls rock out with your knockers out!
by revan86 November 24, 2010
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