Forgetting to add the attachment before sending your email
I thought you were going to send it to me.......Classic Mistach.
by Father Chime June 10, 2015
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A serious error made when shaving around a mustache, causing repeated attempts to "even it out" The result is an ever shrinking amount of mustache remaining.
Hey man, what happened to your face?
Ah, I was in a hurry while shaving this morning, and had a near fatal mistache. Does it show much?
Dude, theres hardly anything left!
by old school 53 November 22, 2009
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An unintentional mustache- That unshaved hair above the upper-lip that was accidently missed by the razor. Taken from the words mistake and mustache a forgotten swipe of the razor and a mistache can appear- Mistaches come in all forms.
D- That mustache looks creepy, what's going on with you?
J- What mustache? What are you talking about? Creepy Eh?
J- "Looks into mirror"
J- Holy geeze. I must have missed some whiskers this morning.
D- So what are you saying, it's a mistache.
J- Mistache is correct, creepy is right; where's the razor?

by jsmil5 March 26, 2008
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An dumb-ass error that causes you and/or others a lot of mild-to-moderate "pain", either physical or mental/emotional.
Campus electrician: I forgot to hook the water-heater back up after I re-did the wiring in the utility-room, and so all da poor students hadda take cold showers the next morning and grumpily showed up for classes wif blueish skin and painful cramps --- what a mistache I made!
by QuacksO July 4, 2018
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