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2.
When you act gay around kids. The kid think you are trying to sexually harass them. You also normally shove drugs up your butt, to prevent you from raping them.
I did a Monohan when i hugged a random Mexican kid on the street.
by thebesturbandictionaryuser1234 November 25, 2011
 
1.
When you take your penis and insert it into your study hall teachers anal cavity!
Kevin monohaned Larry during 7th period study hall.
by Steven Dick January 23, 2007