Top Definition
To be crazy and uncontrollable. Usually happens after a brutal defeat in Halo.
Man Coop-A-Loop went on a loose last night, after I kicked his ass in Halo.
by ~TheCoopCatcher~ January 28, 2004
2 Words related to On A Loose

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.