yehei shmei shmuck
a small circumcised penis 
(in jew talk)

can be used as a: 
noun, insult, or exclamation

"Dude, you have a yehei shmei shmuck!!!" 

"Look what you did, you yehei shmei shmuck" 

"YEHEI SHMEI SHMUCK!! I DROPPED MY PHONE IN THE FUCKING HOT TUB!!!"