When someone has a very large, normally strong, fist, or having a very strong punch. Normally when infused with some kind of metal alloy.
Yo man, Tommy has a crazy fist full o' metal.

Tommy's fist full o' metal broke jims jaw.
by ManiacManEK March 12, 2010
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A person with Metal face mask metal chest plate and assault riffle
There is 3 full metal ak kids in front of us
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In reference to the movie Full Metal Jacket, Full Metal Tappin' involves an individual 'Taking a Blinker' off an empty cartridge or disposable, absolutely frying the user's esophagus and leaving a burnt charcoal taste stuck in their mouth.
Darius: yo whatchu got trav smokin on that shi smell like boof
Donte: Naw iss jus burnt as fuck he Full Metal Tappin' the jawn
Darius: Ah hell naw get this nigga a respirator XD
by SPButters November 3, 2023
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When you're fingering/fisting a girl and use all your fingers, and optionally using the thumb.
Bro I made her cum instantly with the full metal jacket move.
by Lil Beter March 26, 2018
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