knucks (noun) brass knuckles: metal covering for fingers
Sinonime: active, at it, at work,
busy,
engaged, hired, in a job, in collar, in harness, in place, inked, laboring,
occupied, on board, on duty, on the job, on the payroll, operating, plugging away,
selected, signed
Antonime: idle,
inactive, unemployed, unengaged, unoccupied