Purple Tiger 

An act of wrapping a/your penis with fishing wire till it turns purple and swollen with the string making it look like stripes

R- Hey, Jack you ever tried a purple tiger?
J-No.. whats that?
R- ITS FUCKING AWESOME!!

Purple Tiger by That guy with a beard May 4, 2010

purple tiger 

An African-American policeman, whose skin is so dark that it seems purple, allowing him to betray even other black people. Purple tigers are known to appear when tripping balls and/or when watching Walker Texas Ranger. Also a term used to describe purple marijuana.

"PURPLE TIGER!"
"What?"
"Huh?"
"Stop trying to bug me out, faggot"

purple tiger by Chuck Norris Karate Kommandos September 10, 2008