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1.
A coin-operated device, used by low-lifes, cretins, old ladies with blue hair, and idiots who like ringing bells and flashing lights. The sole purpose of a slot machine is to redistribute wealth from the poor and stupid to the rich.

The devices that built the Strip in Las Vegas.

A device into which Californians put the money that finances Nevada's schools.
Shirley cashed her paycheck in the Nevada Club and put all the money into a slot machine.
by The Wog Whomper May 11, 2005
 
2.
A slut. A hoe that likes to have her 'slot' stuffed repeatedly. The higher the amount of the slot, the higher the quality of the slot. A penny slot would be the lowest quality slot known to man. Anyone that exchanges any amount of money for slot insertion is a 'slot machine.'
"Noctem, you mattress-back hoe, you are such a slot machine!"

"Let's go down Sunset Blvd and play the slots!"

by userme March 07, 2006
 
3.
A Gaming device inwhich you have a better chance of getting struck by lightning than hitting the top award.
"Betty dropped $5,000 in that machine and it didn't pay her shit"

"Atleast she's considered a high-roller now, maybe they'll give her a free buffet or hotel room for the night"
by Slotty July 10, 2005
 
4.
The act of one woman pleasuring 5(or more) guys at once. One penis in the mouth, 1 penis in each hand, 1 penis in the vagina, and one penis in the butthole.
The entire offensive line for the raiders went to Sandra bullocks house and used her as a slot machine!!!
by Jamesbond99 March 07, 2011
 
5.
A polite way to address a whore or a woman who is easy
That camille girl, whatta slot machine.
by Hector Garcia5541256 January 18, 2012
 
6.
It is where you shove an unwrapped roll of quarters in your partner's ass and

then have anal sex with them.
"Man, I just slot machined that hoe. She was shitting change fo weeks."
by DCexcel January 07, 2010
 
7.
A 'slotmachine' is a woman's cleavage. Can only occur in women who have fairly large breasts. Cougars often use their 'slotmachines' to attract young, wealthy men.
Dude, look at her!
I know man, check out her slotmachine!
Oh man, that's gnarly...
by Reeves69 December 05, 2010