slang. recently became the official replacement for "polish a turd" in the ever popular phrase "you can't polish a turd".
while you still can't srt-4 a turd, many think that by paying the hourly goons at ye olde dodge factory to glue a turbo-charger to a silly dodge neon engine it will in fact create a glossy finish on a piece of feces. the car is intended for bedwetters and dog dick rubbers who can't afford a real car like a honda s2000, bmw m-series or acura tl type-s or aren't smart enough to properly affix a turbo-charger to a car that isn't already named "neon". the srt-4 phenomenon is basically the same as the 1980's dodge goons putting a faux-leather, glue on top(attempting to look like a convertible) to a dodge aries k-car and calling it a chrysler lebaron. again, this car was very popular with the recently gay but familiar with broke crowd.
"wowie zowie leroy, that white girl you are courting is one seriously ugly girl."
"don't sweat is mister anderson, my sistah works at glamour shots and this saturday we gonna srt-4 her up."
"gee leroy, that's swell. </vomits>"