noun
(often childish) A bird; especially, a small and cute one.
(golf) The completion of a hole one stroke below par.
(badminton) A shuttlecock.
(Philippines, slang) A penis.
(electronics) An electromagnetic signal generated from within an electronic device.
(usually preceded by "the") A certain rude gesture in some countries, formed with the middle finger.
(usually preceded by "the") A certain rude gesture in some countries, formed with the middle and index fingers.
verb
(intransitive, golf) To score a birdie.
(transitive, golf) To score a birdie at (a hole).