Refers generically to DJ turntables, etymology is a derivative of the best-selling professional-grade DJ turntable, the Technics SL1200, which has for better or worse become the de-facto standard in the club world. See also wheels of steel
Tonight we've got DJ Judge Jules playing live on the ones and twos, live on BBC Radio One.
Etymology is from the cartoon "Popeye", where the character Wimpy would frequently utter this phrase. He was a glutton, and would consume burgers at a ferocious rate but could rarely pay for his habit.
The phrase implies the underlying feeling that the person will unlikely actually pay for the hamburger (or whatever) on Tuesday (or ever, for that matter.
I told my bank that I'd gladly 'pay them tuesday for a hamburger today' to buy that new sportscar, but they wouldn't approve me.