What does FDOI mean?

First day of issue

FDOI

Other definitions of FDOI:

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How to use the term
FDOI:

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More slang terms:

GTBOH

GTBOH

Glad To Be Of Help

GLGH

GLGH

Good Luck and Good Hunting

ROTM

ROTM

Right On The Money

IJEOMK

IJEOMK

I just ejaculated on my keybord