Definitions by Bleve

When the shit hits the fan 

When a hidden or contained problem (the shit) is suddenly exposed or spirals into utter chaos (shit making contact with rotating fan blades) causing a change of tactic from problem elimination (disposal of shit) to damage control or abandonment (cleaning of all traces of bits of scattered of shit or escaping as situation is now unmanageable)

When the shit hits the fan, we’re going to need to call in a cleaner

When the shit hits the fan by BLEVE March 20, 2013

The Sludge 

The act of sexual activity where the male gives one brutal pelvic thrust that can run the risk of injuring the female/male's insides.

Wow, Robby really gave Becki the sludge last night, because she is walking very weird.

The Sludge by Bleve August 15, 2006