The Collaborative International Dictionary of English v.0.48:

Glunch \Glunch\ (gl[u^]nch), a. [Cf. Glump.]
   Frowning; sulky; sullen. --Sir W. Scott. -- n. A sullen,
   angry look; a look of disdain or dislike. [Prov. Eng. &
   Scot.]
   [1913 Webster]