assid rain 

contaminated shit that rains from your ass with possible spicey, stinging and/or staining properties.

The flowers wilted in the bathroom after my assid rain dump.

assid rain by sheepyone January 14, 2009

Asscid rain 

When you're pile driving a girl in a hot room & your ass sweat drips on her face.

Who ya been fuckin? You smell like you got caught in an asscid rain shower without an umbrella.

Asscid rain by M & A Cat June 19, 2017