Top Definition
when ejaculating, cum keeps spraying out for a prolonged period of time, sometimes spurting out, often combined with uncontrollable shaking of the pelvis.
dude, i just had an uncontrollable giz spasm that lasted for like 2 minutes straight
by eric667835 April 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.

×