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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 gameโ€ฆ"
"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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