Top definition
A permanent way to turn that frown upside down; take your depressive/emo/irritating bastard, shove a credit card or similar object into his gob so that it separates his jaws, and carve two curving lines from each edge of his mouth to as close to his ears as you can get without cutting into bone. The results will put a smile on every dial. Especially the staff at the emergency ward.
'Turn that Fall Out Boy crap off before I give you a Glasgow Grin!'
by DarkDecapodian January 16, 2009
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