Definition of blue peters:
(n) :
(nautical) A blue signal flag with a white rectangle in the centre, signifying "P". When flown alone, indicates that a ship is ready to sail, requiring all crew members and passengers to return on board.
(n) :
(card games, intransitive) In whist, a play that calls for trumps by throwing away a higher card of a suit while holding a lower one.
(v) :
(card games, intransitive) In whist, to play a blue peter.
(n) :
(US) American coot, mudhen (Fulica americana)
(n) :
(US) American purple gallinule (Porphyrio martinicus)
(n) :
Alternative letter-case form of blue peter. [(nautical) A blue signal flag with a white rectangle in the centre, signifying "P". When flown alone, indicates that a ship is ready to sail, requiring all crew members and passengers to return on board.]