John calmly lays down naked in the bath tub. Naked Jill squats over him in a cat like state of readiness. John screams, " Turn on the water!!!". Jill proceeds to defecate on John. Thus completing the age old ritual of the Japanese Bath.
by Dr. Googlimoogly January 12, 2012
First referenced on the Steve Dahl/Gary Meier show on WLS in Chicago in the 1980s, it refers to one or more people bathing an individual using only their (human) tongues as the washing/cleansing agent. Hence the name.
"Pardon me, but I must be going; my manservant David has arrived to give me my weekly Japanese tongue bath."
by Reacharound McGillicuddy June 17, 2013