1 definition by Prion909

Top Definition
In wakeboarding, the forthy dog, is the largest wave that forms during a double-up.
A double up is when the driver of the boat circles and intercescts its own wake at 90 degrees. During that time the waves combine to form larger waves. The largest wave formed during the double up is termed the frothy dog.
by Prion909 March 24, 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.