A health or medical condition, such as diarrhea, constipation, or heavy menstrual flow, that is left unspecified so as to avoid a response of "TMI!!!" (too much information)
employee: I'm sorry, I can't come in today, I've got the TMI's
boss: the TMI's?
employee: I've got horrible diarrhea, in fact I completely shit the bed last night
boss: TMI!!!