spim(n.) Also spelled as spIM, spam over instant messaging (IM). Spim is perpetuated by bots that harvest IM screen names off of the Internet and simulate a human user by sending spam to the screen names via an instant message. The spim typically contains a link to a Web site that the spimmer is trying to market.
Also referred to as instant spam or the less-intrusive sounding IM marketing.
(v.) To send someone spam through an instant messaging application.
A spimmer is the individual or organization responsible for sending the spim.