intransitive. To act in a mime or dumbshow; to perform as a mummer. Also occasionally transitive: to act out (a play, etc.).

(intransitive) to act as a guisard, to masquerade. (Only in verbal noun.)

intransitive. To take part in a mumming. Usually in present participle, esp. in to go mummering. Cf. janney, n.

(intransitive) to act as a mummer, to go masquerading; cf. guisard v. at guisard, n.2 derivatives.

A Christmas mummer in Newfoundland. Hence as v. intransitive, to act as a janney; to dress up as a janney.