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1.
The sound that a cash register makes when its drawer is closed after money has been put inside. Used in conversation to indicate that the person being spoken about is going to or already has made quite a profit at little expense.
Steve: Yeah, so I was able to sell the FIFA for $50! Cha-ching!

Fentruck: Good deal. How much do you think I could get for one?
by Diggity Monkeez April 25, 2005
 
2.
1) the sound of a cash register
2) the sound that plays in your mind when you get your check
1) Cha ching, two dollars and thirty-three cents is your change.
2) Oh yea, I just got paid cha ching, now I'm getting laid.
by snorgle October 18, 2003
 
3.
an expression used to show excitement after something good has happened.
The homework I didn't do last night wasn't collected. Cha-ching!
by Meghan February 10, 2005
 
4.
An enthusiastic expression when you get money you did not do much to earn, OR found money
He wanted another one of those cha-ching!

I looked in the couch and found two bucks cha ching!
by Dick Weed March 07, 2005
 
5.
Means "money" is to, or can be, made in an instant.
References the sound older type cash registers made when tabulating a final bill.
Like when someone slips and falls on a banana peel in Trump Tower due to the negligence of the Trump Tower clean up crew to remove that discarded banana peel from its entrance way. That first thought in one's mind would be LAWSUIT!! ...and the first words out of their mouth would be "CHA' CHING"
by CLowther December 15, 2004
 
6.
Something that is said once money has been earned or taken.
"I just bitch slapped that ho, and got my 4 G's. Cha-Ching!!!".
by Devil May Cry July 22, 2003
 
7.
(Verb) - The act of letting sweat, genital hair, or semen drip off of the crotch region into the mouth of another man or woman while crouching over their face.
Jack really enjoys chaching Jill.

Jill had an unexpected chaching on Jack as they were having sex.
by malonestudents November 30, 2010