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1.
Cuney mark is the same as cutie mark from my little pony friendship is magic.

Sweetie belle says 'Cuney mark' though.

Just because she's cute like that.
"If i do that, maybe i'll earn my cuney mark!"

"Sweetie belle, its cutie mark, not cuney mark. Silly filly"
by Yours truly, Pegasis October 01, 2011