Yours, Etc.: Origins and Uses of 8 Sign-Offs
"to complain peevishly," British, informal or dialectal, ultimately from the northern form of Old English hwinsian, from Proto-Germanic *khwinisojan (cf. Old High German winison, German winseln), from root of Old English hwinan "to whine" (see whine (v.)). Related: Whinged; whinging.