Grand

I was watching the American TV Drama "Entourage" today online. While I was watching this TV show, a question arose.


When they were talking about money, someone said "Give me 20 grand". (I was not sure about the spelling of grand......)


It sounds like a huge amount of money.


I asked this question to American people and then they taught me about "Grand".


"A 'grand' is 1,000 dollars, so '20 grand' is 20,000 dollars.
I don't know where we got that slang word, maybe because 'grand' is close in meaning to 'great'?"


I also searched bymyself online and they said this is very common slang.


There are really many slangs about money. It is interesting.