Top Definition
A regular buttoxial moon, with the addition of the scrotal region exposed.
I sack mooned an old man. he said i have big balls.
by Dr.joseph October 20, 2002
1 more definition
To moon someone (showing his naked ass) with ballsack included.
Growse! He just sackmooned me big time.
by London-G September 13, 2009

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