A vacation or short period where close male friends get together and do things only a bunch of guys can do together: show a lot of man love, do things in private or public that only guys accept, and other people would think are pathetic.
No girls are allowed in the vicinity.
This is like a honeymoon, only for 2 or more men having a boys night out day after day.
Consider it a bachelor party that continues for the length of a vacation.
Boys being boys for a week, and sharing the man-love.
Manmoon: 1) A Vegas Trip full of the requisite manly activities.
2) Two brothers hanging out doing stuff they can't do with their girlfriends, or family or sisters around.
3) A bunch of high school or college or grad school buddies getting together on say a fishing trip, and shooting the breeze about life, complaining about their wives, jobs, etc., and just having a good time with a bunch of testosterone filled activities.
When someone gets in trouble for having weed in their room because it smelled even though they weren't the ones causing the smell; when someone gets arrested, guns drawn, for drinking in their room, but later make jokes with the cops and become BFF, leading to their release without jailtime and a warrant, dead or alive, if seen in hassayampa ever again. All of this leads to the definition.....a disguise tattooed onto the face to make one look like there is a moon on them (rather than a moonman, manmoon's opposite, which is a man on the moon).
Tony Christensen is a manmoon.
When two hetrosexual men go on holiday to a hoonymoon resort.
Jon and Suraj are man-mooning in Langkawi while their girlfriends are back in London.