wash bag 

Said just before taking a shower in which the main reason is more to wash the genitalia than to wash any other part. Can also be used for the instances for men who jerk off in the shower.

Man> Yeah dudes I gotta go wash bag.
anyone else> thanks for telling us... ass!

wash bag by Airrazor September 23, 2005

bag wash 

A bag wash is when one has used almost all of their amphetamines/cocaine or other powdered narcotic, and is left with no choice but to rip the bag open and suck the bag clean.

Charlie sheen had been partying for three days solid and his dealer had gone to bed, so he bag washed

bag wash by Clountercockwise August 2, 2016