Simply, a cold shower.
guy 1: man, when i got home i had a Man Shower
guy 2: whats a man shower?
guy 2: a cold shower
The man shower is taken in a very short time period, usually 2-4 minutes. It involves a cursory washing of the bare essentials needed for the male body to be minimally clean: hair, armpits, balls, face (optional) and feet (optional). The man shower can be done with a small amount of shampoo and a bar of soap or body wash. It does not require a washcloth or puff (in most cases if a puff is used, the man is homosexual.)
The man shower is usually taken under the following conditions:
(1)When there is time constraints and a full body shower is not practical
(2)The day after a full body shower is taken for the purpose of staying fresh until the next full shower.
(3)Can be taken because of laziness
(4)To conserve water for environmental reasons
(5)Is the only showering method available for troops in Iraq (if they even get a chance to shower).
It is generally accepted that the man shower will keep a guy fresh and clean up to 24 hours; Whereas a regular shower (a shower taken with thick lather covering all areas) can last as along as 2 days. One must keep in mind the variables that affect the length of freshness after a shower (i.e. perspiration level, unexpected exposure of the body to filth, quality of soap or lack of soap and level of activity.)
Dave took a regular shower yesterday but played baseball afterwards, so today he took a man shower 20 minutes before going to work.
An "attempt", usually organized at work by fellow employees, to celebrate the upcoming birth of a MAN's baby. Festivities typically take place in a office conference room and feature store bought cookies.
We will meet in conference room J at 1:00 for Billy's man shower.
A Man Shower also can be used to refer to multiple men sharing a shower. When there are more men than showers and there is a time constraint, this type of Man Shower can be called. No touching or staring is allowed, lest ye be banned from all future Man Showers and shunned/mocked for many years.
"We have to leave in ten minutes and we still have 5 guys who haven't showered yet. With two showers, this is going to take forever!"
"I'm up for a Man Shower."