Thrum, v. t. [imp. & p. p.Thrummed (?); p. pr. & vb. n.Thrumming.] 1. To furnish with thrums; to insert tufts in; to fringe.
Are we born to thrum caps or pick straw? Quarles.
2. (Naut.) To insert short pieces of rope-yarn or spun yarn in; as, to thrum a piece of canvas, or a mat, thus making a rough or tufted surface. Totten.