Chris Brown -- Slaps Tupac Lyrics On $500K Lambo!!

Chris Brown knows how to suck all the value out of a perfectly good $500,000 Lamborghini ... hire someone to slap lyrics from a Tupac song all over the formerly sexy ride.

Chris' inspiration for his latest paint job was Tupac's "Lord Knows" -- and it took artist Huero 16 hours to hand paint the song lyrics on the car's roof and hood.

Give CB credit for one thing -- he made sure Huero didn't use any f-words or n-words in the final product ... y'know, to keep it kid friendly. That's classy ... gangsta style.

Of course, you remember some of Chris' previous lambo work -- the multi-colored Hot Wheels version, the powder blue, and the one covered in fingerprint residue.

Ferruccio Lamborghini ... continuously rolling in his grave since Breezy learned to drive.