Someone who's super petty; a low-level
hustler or thief who only goes after
small dollars; a
nickel-and-dimeing businessperson.
"That nickelrat is
always trying to borrow
two dollars from me."
"That's the third time that nickelrat at the market tried to short change me."
"That nickelrat had the nerve to say "let's
split the check" after HE asked ME out."