To chip in

Chip Chip (ch[i^]p), v. t. [imp. & p. p. {Chipped} (ch[i^]pt); p. pr. & vb. n. {Chipping}.] [Cf. G. kippen to cut off the edge, to clip, pare. Cf. {Chop} to cut.] 1. To cut small pieces from; to diminish or reduce to shape, by cutting away a little at a time; to hew. --Shak. [1913 Webster]

2. To break or crack, or crack off a portion of, as of an eggshell in hatching, or a piece of crockery. [1913 Webster]

3. To bet, as with chips in the game of poker. [1913 Webster]

{To chip in}, to contribute, as to a fund; to share in the risks or expenses of. [Slang. U. S.] [1913 Webster]