Top Definition
The act of sneaking up behind your mother and shouting "RAR!!!!"
your mother is washing the dishes and you shout "rar!!!" from behind her, causing much damage and anger...mumrar
#disturbance #practical joke #anger #cross #mad
by The King 57 March 14, 2009
An ugly, scary man.
He's an absolute Mumrar!
by Cerian June 06, 2003
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