To sell a product or service to someone at the same or close to what the product or service will cost you.  Hence the person that you are selling to is being given a substantial discount on the normal price.  As the term "mates rates" suggests this level of discount is usually only given to mates, or friends, of the person selling the product or service.
Bob:  "Hey Johnno, how much did you pay for that computer?"
John: "Got it real cheap mate. Trev sold it to me at mates rates."
John: "Got it real cheap mate. Trev sold it to me at mates rates."
by M Provost December 27, 2005
 Get the Mates Ratesmug.
Get the Mates Ratesmug. by trumpet trousers June 5, 2015
 Get the rim ratingmug.
Get the rim ratingmug. The probability that an award will drop from an enemy when killed by a player in most RPG based video games.
by SuburbanDefined January 8, 2016
 Get the drop ratemug.
Get the drop ratemug. Bob: Hey, did you catch the new Family Guy last night?
Jim: You shittin' me? Just another shameless ratings trap.
Jim: You shittin' me? Just another shameless ratings trap.
by Dr. Manny January 6, 2015
 Get the ratings trapmug.
Get the ratings trapmug. The age a country uses for the appropriate function (age limit) to watch a film with horror, nudity, violence, and or graphic violence. Each countries RATED-R functions are different. There are no inherent international laws.
This is an example of a RATED-R film? Yes, this is one I watched before it was edited. I was twenty one years old.
by 3wk2fd February 12, 2018
 Get the RATED-Rmug.
Get the RATED-Rmug. Derived from the baseball WAR rating, the GAR rating stands for girls above replacement. A GAR rating can be assigned to anything from a new article of clothing to a new car and basically describes the amount of girls that you will now get with every year that you wouldn't have gotten without it.
These new pants are sweet...the GAR rating is at least 2.0
Dude why would you sell your car? It had a 5.0 GAR rating
That sweater has a GAR of like 20. I just popped a boner
Dude why would you sell your car? It had a 5.0 GAR rating
That sweater has a GAR of like 20. I just popped a boner
by lalalalala23 December 5, 2012
 Get the the GAR ratingmug.
Get the the GAR ratingmug. The number of chops you take in a day divided by the number of showers you take in that same day. (# of chops/# of showers)
Calvin: Heyyyy man
Avery: Heyyy man, what’s your grime rate?
Calvin: 0.5 hbu?
Avery: .... 1.5
Calvin: SUP GRIME
Avery: Heyyy man, what’s your grime rate?
Calvin: 0.5 hbu?
Avery: .... 1.5
Calvin: SUP GRIME
by FunnyDog55 November 4, 2019
 Get the Grime Ratemug.
Get the Grime Ratemug.