Wanking on a plane, usually in the plane lavatory. Like the Mile High Club but far easier to attain and much more shameful.
Example 1
Guy1:Johnny's been in the bathroom awhile, I bet you he's joining the Mile High Club.

Guy 2: Pfft maybe as a half member!
Johnny: Guess who's now a Mile High Club Half Member!

Guy 1: Called it!

Example 2
Drunk guy:Never have I ever joined the Mile High Club!

*Johnny guy drinks*

Johnny:I'm a Mile High Club half member!
Drunk guy: Ew man gross!
Johnny:Hey dude, it was a long flight and I was bored.
by mrperson123 January 30, 2018
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On a long flight home from a business trip, Jimmy got extremely horny and needed relief. As he didn’t have a willing partner at hand, he went into the bathroom and joined the mile high-five club.

Term coined by: Matthew Ripley Wright
by Vthippiechick May 15, 2022
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ultra-exclusive club for espresso mocha fiends wherein their beautifully benevelont barista's give them a discounted price on there usual drink in order to be rewarded with a generous tip.
or hot hot sex.
is that a tip for now or a tip for later?
by le j. November 9, 2004
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Contrary to popular belief, *this* definition refers to the most difficult, rage-inducing Veteran mission from Call of Duty 4: Modern Warfare. Mile High Club is the epilogue to CoD 4, and attempting to complete it on Veteran is wishing for death's sweet release after only about 5 attempts.
"I've broken 3 controllers trying to beat Mile High Club."
by BiMaruZura November 12, 2022
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