to take a shit in ones body wash bottle.

A derogatory reference to a slickered up male scrotum used to a impugn that someone is a complete asshole and/or douche bag.

May also be exactly that, a lathered and slickered up male scrotum.

The resulting foam from a sweaty ass, and not wiping properly.

Like when you wash your hair a second time in a row you get much more lather. The lather effect refers to when you get intoxicated a second night in a row, you get much more intoxicated.

"So remember, my friends, if you’re going to rinse and repeat always beware the extra bubbles." -- From the movie "The Lather Effect"

when one pours soap or detergent in a jacuzzi, playing with the bubbles and foam. most often done by germans.

When in the act of intercourse the male keeps his pants on and upon finishing is left with a Lather on his zipper region

When making love, the combination of liquids secreted from the bodies of both parties. Meant to be rubbed and massaged into the skin.