That grotesque ruddy,oily & watery substance that squirts onto you're cheeseburger when you forget to shake the ketchup bottle.
Fuck! I forgot to shake the ketchup bottle and now my burger is slathered with wetchup.... Fuck!
by Tropes May 15, 2006
1 more definition
The nasty water that comes out of the ketchup bottle before the ketchup actually comes out.
As soon as I opened the bottle of ketchup to pour it out, the wetchup came out first and made me not want to eat my burger anymore.
by Zach Brendahl December 14, 2007