ones
noun
1
the first landing or floor level in a prison UK, 1996.
2
in the gambling game two-up, a throw of a head and a tail AUSTRALIA, 1911.► all the oneseleven. In Bingo, House or Housey-Housey calling, the formula 'all the' announces a double number UK, 1943.► on the ones and twosin prison, used of a sex offender, convicted paedophile, etc. A variation of NUMBERED OFF; ON THE NUMBERS UK, 1996