Top Definition
option to be in email list, e-mail that is sent to many people at the same time.
opt in now for Starcraft 2 beta key
by Bero0o May 19, 2009
5 Words related to Opt in

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.

×