In life, as in a septic tank, the big pieces of shit always float to the top. Here’s one popping up now . . .

George Zimmerman has sued the family of Trayvon Martin, the unarmed black teen he killed during a confrontation nearly eight years ago.

The former neighborhood watch volunteer, who was acquitted of homicide charges in the 2012 killing, filed a lawsuit against the teen’s family, prosecutors and others involved in the case, reported the Miami Herald.

The suit, filed in Polk County Circuit Court by Tea Party gadfly lawyer Larry Klayman, cites a documentary that accuses Martin’s family of engineering false testimony.

Zimmerman’s suit, which was distributed to the media by the documentary’s director Joe Gilbert, is seeking $100 million in civil damages.