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Short for hideous monster. Used to describe a woman of undesirable physical traits. Due to the urgency faced when pointing out such filth, Hidmo was developed as by the time it took to say hideous monster the bitch was out of sight.
Hidmo, 2 o'clock!

Ew quick check out that hidmo!
Yeah she makes me want to spew, what a disgusting face
by grogan2000 May 17, 2009