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1. cash on the barrel
also "cash on the barrelhead". Means that you give me cash, and I'll give you the product at that time. No credit no delivery.
Buddy: You ever think about selling that old juicer?
Barbara: I'll give it to you for $20 - cash on the barrel.
Buddy: OK, here is the money.
Barbara: Thank you, here is the juicer.
Buddy: It has been a pleasure doing business with you.
Barbara: The feeling is mutual.
2. cash on the barrel
when you have a formidable proposition and want to close the deal
Don: Lookie here boy, I'll give you $50 for it.

Bill: Done. Cash on the barrel.
3. Cash$$
A rap group that is pronounced "Cash Money" that has released 1 album and is working on the second. The second one is called 'Zimmermann'. The first one is self titled with the tracks such as, 'Billy's Got A...', 'Yo Mama Is A Dyke', and 'Feathered Hat (feat. We Are McElheny)'. Cash$$'s third album is going to be titled 'Dreyfuss' and has a track on it called 'Titties, Titties, Fuck Now (TTFN)'. The members of Cash$$ are: Lava, Mudslide, Robinhood, and Cumshot.
Example 1:

Person 1: "Did you see that Cumshot chick from the band Cash$$?'
Person 2: "Yeah, she's so hot!"

Example 2:

Person 1: "What was that badass song called?"
Person 2: "It's called, 'Yo Mama Is A Dyke' by Cash$$."
4. Cash Room
A mythical place, not necessarily an actual room, where the proverbial "pot of gold" is rumored to be.

Alternative definition: an actual room where one keeps a collection of Johnny Cash memorabilia.
Geoff retired to his Cash Room but instead of a pot of gold, he found a pot of honey, and decided to get honeyed up.
5. Cashin' On
Same as tashin' on but for cash
Alright bruv? You been cashin' on lately?
6. Cod
Cash-on-delivery,

Reference is from the Spinal Tap album 'Break like the wind'
Make it cash on delivery if you're gonna do business with me, let's keep it strictly c - o - d
by Andy Dec 15, 2003 add a video
7. on my life
A phrase that emphasizes that one is speaking very truthfully or stating a fact in which he truly believes. Literally means that the person would bet his life on the validity of the statement.
"Gotta keep ya cash coming and that's on my life." -Ja Rule, "Wonderful"

"Suge Knight's a bitch, and that's on my life." -Snoop Dogg, "Pimp Slap'd"

"I pissed on your 12-year-old daughter last night, and that's on my life." -R. Kelly, "Your Daughter Drank My Piss"
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