My mother and I came up with this while in Wal-mart. It means Move Your Fucking Ass. Myfa! said like "miff-uh."
MYFA MYFA MYFA!! You are in my way- MYFA!
by Jeanette Fritsche November 12, 2004
Less than LOL but more than a smile. An acronym for Makes Your Face Ache. A cross reference to Frank'n'furter's line in The Rocky Horror Picture Show - 'Even smiling makes my face ache'
by Frogflayer February 20, 2009