Scum

Source : Wright, Joseph English Dialect Dictionary web : https://eddonline4-proj.uibk.ac.at/edd/main.html

10. To catch the herrings that fall from the net as they are hauled. Bnff.1 A scummt half a basket o' herrin' the streen. Hence Scummer, sb. (1) the boy in the herring-boats, who catches the fish that fall from the nets when being hauled. Bnff.1; (2) the small pock-net on the end of a pole by which boys catch the herrings which fall from the nets. Cai.1 11. Fig. To glance; to look at hurriedly. Sh.I. Skoom up, daa, an' staandin' an' glower up at da lift laek a güse glyin' at thunder, Sh. News (Apr. 22, 1899). Cai.1 To scum o'er a document. [8. Some scumd the drosse that from the metall came, Spenser F. Q. ii. vii. 36.]