Wandering up and down without certain seat, they lived by scumming
those seas and shores as pirates.
Milton.
Scum, v. i. To form a scum; to become covered with scum. Also used
figuratively.
Life, and the interest of life, have stagnated and scummed over.
A. K. H. Boyd.
Scum"ber (?), v. i. [Cf. Discumber.] To void excrement. [Obs. or Prov.
Eng.] Massinger.