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1.
A port located at the Southeastern edge of S Korea. Lots of great sea food, and shopping to do. Could be labelled as the San Francisco / Boston of S Korea.
Man, I ate raw fish at a restaurant in Pusan. It tasted great!!!
by RedDevil July 13, 2003
 
2.
Alternate word for the male ass crack. Popular in many gay communities as well as college frats.
Bryce: "Dude I'm about to go get laid by Pusan"

Michael: "So in other words your going to go stick your dick in that black guys ass again?"

Bryce: "Yes I guess you right"
by Norcal41 November 19, 2009