Top Definition
adj. A word to describe a response that was so quick, it seemed almost instantaneous.

Usually to describe a friend's reply on some IM services, like: MSN, Facebook
LJ: hey bro, you coming out for a drink with the lads tonight?
{Message sent on 03/06/09 at 10:23}

LJ: OKkk then. I guess you are not coming then. Pat and Kev said theres going to be alot of hot models from the carshow yesterday.
{Message sent on 03/06/09 at 11:58}

Rich: Im coming.
{Message sent on 03/06/09 at 11:58} <---Respontaneous
by THE_REAL_LJ June 03, 2009
5 Words related to Respontaneous

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