1819 J. H. Vaux New Vocab. Flash Lang. in II. 206 Slour, to lock, secure, or fasten; to slour up is also to button up; as one's coat, pocket, &c.
1834 W. H. Ainsworth II. iii. v. 345 No slour'd hoxter my snipes could stay.
1859 J. C. Hotten 95 Slour'd hoxter, an inside pocket buttoned up.