beat the daylights out of

beat/knock the (living) daylights out of somebody

to hit someone very hard many times I'll knock the living daylights out of him if I catch him doing it again!
See also: beat, daylight, of, out
References in periodicals archive ?
PETER CORMACK plans to abandon night-time training to help his Morton players beat the daylights out of the opposition and climb off the bottom of the table.