Deusch - A pathetic annoying jerk. Someone commonly obnoxious without reason, or extremely arrogant and selfish.
Douche - A chemical based cleaner for a vagina.
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."
Dave's Friend: "Nope, but I do know I walked in on John's sister cleaning her vagina with a bag of douche."