The Collaborative International Dictionary of English v.0.48:

Flip \Flip\ (fl[i^]p), n. [Cf. Prov. E. flip nimble, flippant,
   also, a slight blow. Cf. Flippant.]
   A mixture of beer, spirit, etc., stirred and heated by a hot
   iron.
   [1913 Webster]

   Flip dog, an iron used, when heated, to warm flip.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Flip \Flip\, v. t. [imp. & p. p. Flipped (fl[i^]pt); p. pr. &
   vb. n. Flipping.]
   1. To toss (an object) into the air so as make it turn over
      one or more times; to fillip; as, to flip up a cent.
      [1913 Webster]

            As when your little ones
            Do 'twixt their fingers flip their cherry stones.
                                                  --W. Browne.
      [1913 Webster]

   2. To turn (a flat object) over with a quick motion; as, to
      flip a card over; to flip a pancake.
      [PJC]

   3. To cause (a person) to turn against former colleagues,
      such as to become a witness for the state, in a criminal
      prosecution in which the person is a defendant. [cant]
      [PJC]

   4. (Finance) To resell (an asset) rapidly to make a quick
      profit. [cant]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Flip \Flip\, v. i. [imp. & p. p. Flipped (fl[i^]pt); p. pr. &
   vb. n. Flipping.]
   To become insane or irrational; -- often used with out; as,
   seeing her mother killed made the girl flip out.
   [PJC]

WordNet (r) 3.0 (2006):

flip
    adj 1: marked by casual disrespect; "a flip answer to serious
           question"; "the student was kept in for impudent
           behavior" [syn: impudent, insolent, snotty-nosed,
           flip]
    n 1: an acrobatic feat in which the feet roll over the head
         (either forward or backward) and return [syn: somersault,
         somerset, summersault, summerset, somersaulting,
         flip]
    2: hot or cold alcoholic mixed drink containing a beaten egg
    3: a sudden, quick movement; "with a flip of the wrist"; "the
       fish flipped over"
    4: the act of flipping a coin [syn: flip, toss]
    5: a dive in which the diver somersaults before entering the
       water
    6: (sports) the act of throwing the ball to another member of
       your team; "the pass was fumbled" [syn: pass, toss,
       flip]
    v 1: lightly throw to see which side comes up; "I don't know
         what to do--I may as well flip a coin!" [syn: flip,
         toss]
    2: cause to go on or to be engaged or set in operation; "switch
       on the light"; "throw the lever" [syn: throw, flip,
       switch]
    3: look through a book or other written material; "He thumbed
       through the report"; "She leafed through the volume" [syn:
       flick, flip, thumb, riffle, leaf, riff]
    4: toss with a sharp movement so as to cause to turn over in the
       air [syn: flip, twitch]
    5: cause to move with a flick; "he flicked his Bic" [syn:
       flip, flick]
    6: throw or toss with a light motion; "flip me the beachball";
       "toss me newspaper" [syn: flip, toss, sky, pitch]
    7: move with a flick or light motion
    8: turn upside down, or throw so as to reverse; "flip over the
       pork chop"; "turn over the pancakes" [syn: flip, flip
       over, turn over]
    9: react in an excited, delighted, or surprised way; "he flipped
       when he heard that he was accepted into Princeton University"
       [syn: flip, flip out]
    10: go mad, go crazy; "He flipped when he heard that he was
        being laid off" [syn: flip, flip out]
    11: reverse (a direction, attitude, or course of action) [syn:
        interchange, tack, switch, alternate, flip, flip-
        flop]

The Free On-line Dictionary of Computing (19 January 2023):

FLIP

   1. An early assembly language on the G-15.

   [Listed in CACM 2(5):16 (May 1959)].

   2. ["FLIP User's Manual", G. Kahn, TR 5, INRIA 1981].

   3. Formal LIst Processor.

   An early language for pattern-matching on Lisp structures,
   similar to CONVERT.

   ["FLIP, A Format List Processor", W. Teitelman, Memo
   MAC-M-263, MIT 1966].

   (1995-01-31)