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A very non-competitive performance in which one is competely dominated at a game that their opponent had no business even competing in, and the shame that follows thereafter.

"omg I beat her 106-91!!! This is the first time I've ever won at this game!!"
"whoa, she totally hallmanned it up in that game…"
"yeah, shes gonna be walking around with her head down for weeks after that effort - way to hallman it up linds!"
by DR August 03, 2006
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