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1.
rpm
Revoltions per minute, used to refer to car engines, chainsaw blades, records or any other machinery.
540bhp@7000rpm ­  ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­
by Kung-Fu Jesus May 05, 2004
 
2.
rpm
A package used to install programs into Mandrake and RedHat (among other Linux Distros) that requires you to find and download hundreds upon hundreds of other pacakges it is dependant upon
Damn! This RPM has 234 dependencies!
by Kichigai Mentat March 29, 2004
 
3.
rpm
Revolutions Per Minute
Number of revolutions performed by a vinyl record in a minute to be heard correctly
33rpm
45rpm
78rpm (old)
by Gaspacho March 23, 2004
 
4.
RPM
Ring Piece Marks

The line of sweat someone gets on their clothing down the crack of their arse, usually during a gym workout
Sue: Woah that guy is really going for it on the treadmill!

Sarah: Yeah he's cute, just a shame about the RPM
by Kenny_boy June 11, 2009
 
5.
rpm
Rabbits per minute.
the BV6000 is capable of 20 rpm (thats rabbits per minute)
by Bodriz August 09, 2006