boys'

   1. (room)

   a lavatory for exclusive male use:

    Not just for juveniles: I went into 'Boys' and looked around. (Theroux, 1979)

    You should know we never lock the boys' room. (Sharpe, 1977)

   2. any group of men engaged in a nefarious or dangerous enterprise

   It may be a criminal gang, or those in their pursuit. Servicemen:

    The boys are busy tonight. (Home, 1994 — a bomb had been dropped nearby)

   or insurgents, such as the Rhodesian boys in the bush:

    There are still going to be some boys in the bush dreaming of marching into Salisbury. {Sunday Telegraph, December 1970 — as indeed they did)

   or politicians, especially in America, usually in phrases such as the boys in the backroom, who pull the strings behind the scene and must not be confused with the backroom boys, who innovate on behalf of their employer; or as the boys upstairs, from the location of many managerial offices:

    Snyder had appealed to Christiansen for a reduction of his weekly quota. Christiansen said he'd talk to the boys upstairs. (Weverka, 1973)