A man who's penis is equal or smaller than one of a mouse. Usually people with the name "Markus" have a Mouse Dick.
"What's up mouse dick?"
"What happens in Vegas, stays in Vegas; except mouse dick, that's for life!"
"What happens in Vegas, stays in Vegas; except mouse dick, that's for life!"
by Dicktionary1020 January 6, 2015
Get the mouse dickmug.