sick joke(n = noun.communication) - a joke in bad taste;
is a kind of gag, jape, jest, joke, laugh

air sick, anointing of the sick, be sick, blue joke, dirty joke, ethnic joke, joke, play a joke on, practical joke, sick, sick bag, sick bay, sick benefit, sick berth, sick call, sick headache, sick leave, sick list, sick mind, sick of, sick parade, sick pay, sick person, take a joke, visual joke