Description - Deusch is a slang form of the word douche, and contrary to belief, it is a correct spelling do to the difference of context, and considering it is not literal, it is slang.
In comparison..
Deusch - A pathetic annoying jerk. Someone commonly
obnoxious without reason, or
extremely arrogant and selfish.
Douche - A chemical based cleaner for a vagina.
Ex1:
Dave: "Damn, did you hear that John's sister got fired cause she wouldn't
give her boss a blowjob? He's such a deusch."
Ex2:
Dave's Friend: "Nope, but I do know I
walked in on John's sister cleaning her vagina with a
bag of douche."