ISNT is spot on
From the OED (because I have nothing better to do of a Friday evening
)
"6. trans. slang (orig. U.S.). To customize or modify (something, originally a car) so as to be more stylish, ostentatious, or flashy; to improve by customization. Also with out, up. Cf. pimped-out adj.
With reference to the ostentation or conspicuous wealth associated with pimps; cf. pimpmobile n.
Popularized by the name of Pimp my Ride, a U.S. television programme (first broadcast in 2004) in which old or dilapidated cars are remodelled or customized.
2000 Re: What's Deal with Riceboys? in chi.general (Usenet newsgroup) 13 Mar., They have to pimp their ride up.
2002 Rolling Stone 14 Nov. 63/3, I pimped out the Bentley with white-and-blue-striped interior.
2004 N.Y. Times 4 July viii. 11/4 Customizers who ?pimp? their rides with gargantuan tires and costly, flashy wheels.
2006 Canad. Business (Electronic ed.) 25 Sept. 114 You get plenty of options to pimp your PC. For the exterior, you can choose Poison purple, Monaco yellow, [etc.]."