hot under collar (adjective) hot under the collar: very angry
Sinonime: amaranthine,
constant,
continual,
continuous, day and night, endless,
eternal, everlasting,
incessant,
indefatigable, interminable, nonstop, on a treadmill,
perennial, perpetual, round the clock, unceasing,
unending, uninterrupted, unremitting, untiring, world-without-end
Antonime: ceasing, completed, concluded, ending, finished, infrequent,
irregular,
occasional