Definition of mummed:
(n) :
(Commonwealth, Ireland, informal) Mother.
(n) :
(chiefly US) A chrysanthemum.
(n) :
(US, originally Texas) A decoration made originally of a real chrysanthemum but now usually an artificial (silk) flower combined with ribbons and marked with such indicators as the wearer's name, school name, the year, and so on; traditionally worn by girls at high school homecoming celebrations.
(adj) :
(colloquial) Secret.
(v) :
To act in a pantomime or dumb show.
(adj) :
(colloquial or archaic, of a person) Silent.