A chochem, or the female chochema, is a possessor of wisdom, a brilliant person. It's the ultimate tribute to a scholar. But it can also be said of a shrewd man because he's so clever, or inventive. It is said with the highest respect, like 'A chochem of the Talmud. Yet it can be used in a negative way, to make fun of somebody. You'd say, 'Noch a chochem'; that is, 'Another scholar!' Or 'Uch, this is a nuclear scientist! A brain surgeon he'll never be. A genius he's not.' You reverse the meaning so that you call someone a chochem when you don't want to call him a jerk.
I dabble in writing and editing over whatever bits of the pedia that i happen to stumble upon but most likely you'll find my contributions on Danish subjects, political history and issues pertaining to sexuality. I'm fairly anal so I make a fair deal of template additions and revisions too.