Top Definition
when you materbate so much or very hard that your dick turns into a big bruise
dude i was materbating so hard i got a mastabruise
by evansl8esl8esl8e January 15, 2009
5 Words related to mastabruise

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.