Enter a clue or pattern or both:
The Clue
Informal invitation letters (4 letter answer)
The Answer
BYOB
Tags
Notes
The answer BYOB is seen occasionally, appearing about once every 800 puzzles.
Related Clues
Invitation notation
Invitation stipulation
Invite letters
Letters of invitation
P.S. on an invitation
Letters on some invitations
Part of an invitation to an imbiber
Party directive, briefly
T.G.I.F. party request
Abbr. in many a party invitation
Abbr. often near "R.S.V.P."
Drinker's party instruction, for short
"We're not supplying liquor"