The Collaborative International Dictionary of English v.0.48:

Parbreak \Par"break`\, v. i. & t. [Par + break.]
   To throw out; to vomit. [Obs.] --Skelton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Parbreak \Par"break`\, n.
   Vomit. [Obs.] --Spenser.
   [1913 Webster]