In the language of totally random people, shmuck is a happy term for an uber happy psychotic cool person and is not related AT ALL to any part of the penis in this random language. =]
Often used with their nationality as an adjective
Person1: Hey my Dutch shmuck
Person2: Hello my little Irish shmuck!!
a worthless excuse for a human being inept of usefulness in a drunken stupor of self existence.... So true infact that if Ashton Kutcher went back in time and killed said "shmuck", he would be suprised to know that in the future there will be no consequences (ie. butterfly effect) for said individual and no significant change for the loss of their existence
Guy #1: i would help you but im very busy today folding my eviction notice into a paper airplane....