To eat or feed. Used with small children, or retards.
Honey girl, you like mummum?
by Lindsey April 21, 2003
Very prude old woman with an ugly living room. Bam and Jess Margera's grandma(Phil and Don Vito's mom).
"I bet you 'test drove' a lot of 'cars.'"-Mum Mum, Viva la Bam
by Lindsey February 14, 2004