the act fo placing one's pubical sack upon a fallen enemie's (or in some cases, friend's) head, or "dome". usually done to show dominance and/or embarrass another. similar to "teabag". often used during firefights in first person shooter video games.
*carter snipes ryan*
Ryan: WTF?!?!
Carter: DUDE U JUST GOT DOME SACKED!
by dapenguin July 14, 2009
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The act of pulling up the skin from your sack so it covers your penis, making it look like a dome.
1) Jimmy was so drunk last night, he got naked and showed his sister the sack dome.
by thesackdome August 25, 2009
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