Top Definition
when ones penis becomes erect as a result of thinking about people having sex.

Spencer- "hey guess what guys, when I think about sex my willy goes ping"

Rodger- "eww, willy ping!"
by jamalshamali September 01, 2009
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.