Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym BYOY is...

BYOY is

  • Bring Your Own Yarmulke

BYOY is also in:

Acronym Definition Searched: GLWC LCLDQ IGES WMATA MELT HWI MO SLB CFCC CCPO VARS QSL? TAP YO AARGH