chummed

from The Collaborative International Dictionary of English v.0.48
Chum \Chum\, v. i. [imp. p. p. {Chummed}; p. pr. & vb. n.
   {Chumming}.]
   To occupy a chamber with another; as, to chum together at
   college. [U. S.]
   [1913 Webster]
    

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