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U.S.Army field ration can opener. A P-38 is a tiny hinged stainless steel can opener, about one inch long, used during the WWII, Korea and Vietnam eras to open military field ration cans before the adoption of MREs.

"Gimme your P-38 this pop-top broke off."
by Lurch 3RRU I-Corps RVN January 02, 2006
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U.S.Army field ration can opener.
A P-38 is a tiny hinged stainless steel can opener, about one inch long, used during the WWII, Korea and Vietnam eras to open military field ration cans before the adoption of MREs.
by Lurch 3RRU I-Corps RVN January 01, 2006
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Get a p-38 mug for your fish Rihanna.