What does DFO mean?

dumb f**king operator

DFO

Other definitions of DFO:

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How to use the term
DFO:

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More slang terms:

TTTKA

TTTKA

Time To Totally Kick Ass

YOLF

YOLF

You Only Live Forever

EFA

EFA

Edited For Accuracy

BTA

BTA

But Then Again