When you get a boner by looking at asses. Usually female asses.
Guy #1: Did you see ______ lastnight?

Guy #2: Yeah, man. _______ gives me an errectum.

Guy #1: An errectum? What's that?

Guy #2: You know? An errectum. Where you get a boner by looking at a smoking hot ass.
by Beau Vyne March 29, 2010

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.