Top definition
Mouth ulcer. Basically just a small open wound in your mouth that hurts like hell.
by Bobby De Niro October 30, 2005
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2
A canker sore is a sore on the inside of your mouth that you typically can't ignore, It suck ass
Lisa's a total slut no wonder she ended up with a canker sore.
by shanedashiz July 29, 2010
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3
We were having the greatest night of our lives until those 2 canker sores showed up and they wouldn't leave. It always takes too long for a canker sore to go away.
by g_lo_t December 13, 2013
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