noun

• (slang) a gathering of labourers, where employers hire them for day jobs.
  "Even with all that prosperity there were bindle stiffs who didn't do so good: so he and the others dropped into a saloon, got a hundred bucks worth of small change, stepped back into the cab, drove over by the shapeup, that's what they said it was, a shapeup, and they threw money to the guys, laughed when they scrambled for the small change, niggers and wops, some poor yids, and some Americans too: they scrambled on the pier, scraping up a hundred bucks worth of nickels, dimes and pennies."
• (by extension) A regular meeting by a criminal organization in which jobs are assigned.
  "Worse, he required his men to attend weekly shapeups at his social club on a busy street in lower Manhattan."