1 definition by Grisausage

A mustache used to tickle ones scrotum. Usually one of the true "bros" scrotum. Or used in action, to tickles ones scrotum, thus becoming a true bro. Sometimes one mistakes this as extremely intrusive, but this is usually the start of a true bromance.
"Is the man with the brostache invited to this party?"
by Grisausage October 16, 2011

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