1 definition by fisdpdt

Top Definition
A mass text message or email that informs your friends of an impromptu social event.
Researcher 1: We've been sequencing DNA for 13 hours; I need a ton of beer and a dance party, in that order.

Researcher 2: Hell yeah! I'll put out the bat signal.
by fisdpdt June 01, 2007

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.

×