Now climb in back, try not to kick over the gas can
There’s a half a gallon in it, that could be our last chance
We have of just getting home, now can I get that lap dance?

from Eminem – W.T.P. Lyrics on Rap Genius

Em is jamming every possible “white trash” trope into this song — and nothing is more white trash than having a gas can in the back of your car

Though frequenting strip-clubs is also a “white trash” activity, hence the “lap dance”

Em’s poking fun at the spending habits of “white trash”: rather than spending his money on a necessity (gasing up his transportation) he’s spending on momentary pleasure, at a strip club and on lap dance. In so doing, he inadvertently lets the girl know he won’t be a big tipper…

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