Source : Webster's Revised Unabridged Dictionary (1913)

Pip \Pip\, v. i. [imp. & p. p. {Pipped}; p. pr. & vb. n.
   {Pipping}.] [See {Peep}.]
   To cry or chirp, as a chicken; to peep.

         To hear the chick pip and cry in the egg. --Boyle.

Source : WordNet®

pip
     n 1: a disease of poultry
     2: a minor nonspecific ailment
     3: a small hard seed found in some fruits
     4: a mark on a playing card (shape depending on the suit) [syn:
         {spot}]
     5: a radar echo displayed so as to show the position of a
        reflecting surface [syn: {blip}, {radar target}]
     [also: {pipping}, {pipped}]

pip
     v 1: kill by firing a missile [syn: {shoot}]
     2: hit with a missile from a weapon [syn: {shoot}, {hit}]
     3: defeat thoroughly; "He mopped up the floor with his
        opponents" [syn: {worst}, {mop up}, {whip}, {rack up}]
     [also: {pipping}, {pipped}]

pipping
     See {pip}