This word is used when someone very stupid thinks they know what they are talking about. They are called nickels because their input is worth about 5 cents! Example: Will you listen to the nonsense spweing out of Cutulio's mouth, well, thats cause he's a damn Nickel
NICKEL
Meaning of NICKEL in English
Slang English vocab. Английский сленговый словарь. 2012