Top Definition
A phrase used to express feelings of contentness, frustration, and many other emotions.
While laying on the sofa with your loved one and enjoying a cozy day in, one might sigh and say "Muffle Gruffle," as they snuggle in.

Boss: Hey Johnson, your quarterly report is due at noon.

Johnson: (under his breathe) Muffle Gruffle...son of a...
by Moose Wrassler April 03, 2009
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