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1.
In poker, trying continually to hit long shots.
Jose Contreras: That dumbass keeps chasing with his low pocket pairs.
Bruce Lee: He's probably on tilt, don't tell him though... I'm winning a lot of fuckin money.
by benny b from the bronx February 21, 2005
 
2.
The process of researching a subject by starting with article "A" and from "A" following a link to "C" and from "C" following a link to "D" and so on.

It's a good way of wasting time and picking up alot of related information quickly
"I spent four hours chasing the history of the internet through the Wikipedia yesterday"
by Zounds! June 01, 2005
 
3.
Short for Bug Chasing. Term popularized by an article in Rolling Stone. Activity popular among fagtards that think the eroticism in trying to get AIDS for fun is totally rad.
"You don't want to sleep with him, I hear he's into chasing."
by Asshole October 06, 2003