used as a derogatory or racist term for an asian, or a person of asian descent. (derived from a sound made by a south korean woman after being hit in the back by a golf ball.)
man 1: how the h-ll am i supposed to park here? this person’s taken up 2 whole sp-ces!
man 2:probably a stupid muckma.

man walking into a room full of asians: h-llo muckmas!
microsoft, u can kiss my -ss.

a subst-tute for profanity to use when dealing with restrictive or buggy aspects of a microsoft operating system software package. frequently used by pro-linux staff working in an microsoft mandated it department.
1. “arg !! another bsod ! muckma !”.
2. “corporate said we have to use iis”. “muckma..”

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