A Hanoi high five is derivative from the term used in the film 'Tropic Thunder', but has evolved into a sexual move.

A Hanoi high five is where your partner is on the bottom preferably , when they're are at the point of orgasm (liberating the south) you land a bomb/grenade to the dome. There are variations of the finishing move, i.e throwing them out of your house/flat/village/country , ejaculating or ask them to concede victory.

This move can also be used on the back foot, an example below.
The first example would be in a forced sexual situation where you are not the aggressor.
1. He mounted me and when he was about to liberate the south, Bam Hanoi High five.

Another example for emergency situations

1. You are making love, she decides to tell you at the point of liberation "hey you want to meet my parents", Hanoi high five, a perfect gesture to decline that meet.
by _GreenEggs&Ham_ June 15, 2019
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In these troubled times in which we live, we are constantly searching for that one moment of pure joy that can uplift our spirits and bring them to a higher plane. People have sought for centuries that one golden flash of brilliance that would justify their lives, the arrow that would soar into the heart of darkness and vanquish the malevolent vortex that drains the very soul of mankind. We have known of and guarded this provenance of enlightenment for generations, and it is now time for destiny to unfold and unleash this power upon the masses. Of course you know of what we speak: THE HIGH-FIVE!!!
"Dude,you going to High Five Friday?!?!"

"You know it!!!"
by Geoff Enright February 20, 2008
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A mixed drink comprised of Faygo Orange pop and Mohawk Tequila. Plentiful in the Cass Corridor, it is (more or less) the reason Wayne State University has such a low graduation rate.

Its popularity is also directly correlated with unemployment as the drink has become the ironic favorite of former Big Three employees.
Dan: Why is Raj trying to scale Heidelberg Project?
Lou: He passed his Urban Planning exam so we each gave him a Detroit High-Five.

Former GM Employee: It's the second anniversary of my pink slip.
Former Ford Employee: Detroit High-Fives.
by SSicken January 13, 2011
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The act of 2 people perfoming penatrative and oral sex with a third person whilst at the same time high fiving.
I wonder if she would allow us to give her a "High Five Hogroast"
by Dirk The Diggler August 23, 2007
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1. a drinking game.

its story goes a lil something like this. when cassie is drunk she says "high five" ALL the time.

RULES:

*whenever someone says high five...you take 1 shot (or a big gulp).

*whenever someone gives a high five you take 2 shots (or 2 gulps).

Caution: If you are playing this with Cassie....you will be blacked out by the end of the night.
Cassie: HIGH FIVE!!!

Everyone at party: (taking shots)
by A-killz November 9, 2008
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Upon climax while having sex from behind, the male pulls out, ejaculates on his hand and slaps his load all over the woman's ass.
Mike: I just gave Bridgette the best high five of her life.
Trevor: What do you mean?
Mike: Mike's High Five, douchebag! It's the best!
by FatLeboCock6 December 11, 2009
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high-five sex: is sex followed by the girl giving her partner a high-five. This type of sex only occurs with certain women and is a sign that they are a keeper
so man do you know if your girlfriend is the one?
yes we had high-five sex.
by BobHopeLives February 17, 2011
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