Top Definition
An unwanted/unexpected erection or semi-on.
I was sitting on the bus, minding my own business and all of a sudden I got a fat intruder.
by magpie55 July 29, 2011

Free Daily Email

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

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×