a way to describe an incident or occurence in
life as troublesome, or in many cases, to express a generally fucked up state of living.
imagine the literal "tough shit", it's like a
real burning case of the squirts, only as a metaphor for
life. most commonly emphasized sarcastically, as to mock the seriousness of the situation.
Bob: I haven't slept in days, there's a terrible rash on my crotch, my
car got impounded, some other
guy is fucking my girlfriend, and I just lost my job.
Jane: Tough shit man.