"What's up," but how one gets "wassabe" from that is unknown.
Person A: wassabe?
Person B: that means?
Person A: what's up?
Person B: how you get wassabe from that?
Person A: cause I'm cool like that Person B: you're stupid
Topher: "I totally wassabotaged Ryan's conch salad while he was in the bathroom"
Ryan: "Oh damn that's hot! Did you wassabotage me bro?"
Topher: "YUUUUUP!"
"Ey Leroy, watchoo goins ta eat tanight?"
"Ah gots me some fried chicken, cornbread, collard greens, purple kool-aid, and ah gots some wassamelon fo dessert!"