As used by Kim Catrall's character, Samantha Jones, in an episode of "Sex and the City"; a situation of extreme misfortune or catastrophe, usually regarding relationship problems, wardrobe malfunctions, or unintended pregnancy. Those involved in "shit mother fucker fuck shit situations" often find it hard to explain themselves when the truth comes out and then find it even harder to repair the damage they cause.

A long swear

The exchange rate between the words used in the "I don't give a ___" phrase. In a recent treaty between all English-speaking nations, it has been determined that there are:

2.71828183 shits per one fuck
3.14159265 damns per one shit

and 5.02734907 x 10^5 hoots per one damn

Loadza swears ina line

The example used in one of the shrugging emoticon definitions.

when you get really pissed off at someone and put swear words together to make an insult that doesn't make much sense

One who walks around without underwear on and get's an angry red waffle like pattern on their vagina, has a urine and shit fetish, and is either a lesbian or an extremely horny man. (Cunt Munching)