Top Definition
A fart that sounds like someone going "hop top top top". Like a World War 1 bi-plane starting up.
"Ye gods, that hoptop fucking hums!"
by Lewis1983 May 30, 2005

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.

×