Top Definition
A nickname for the fire-selector switch on a fully-automatic firearm. Saying that a particular firearm has a "happy-switch" indicates that it is capable of fully-automatic fire
My new AK47 has a happy switch, so I can fire in full-auto!
by David (courtesy of LHS) April 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 We'll never spam you.