An expression of disbelief, as in "I find that extremely unlikely". A South Wales linguistic expression, especially associated with Swansea.
“I reckon Wales will beat England in the next Rugby home nations” “Cow off, they’ve got no chance."
or
Wembley stadium should be completed in 12 months” ”Cow off, there’s enough litigation to last for the next 12 years”
by Elizie June 11, 2006
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Someone who LIVES off knock offs of famous designers, and yet go around boasting that they're filthy rich 'cuz they wear "designer" clothes. (You gotta have a good eye to spot these "cows" out)
(Olivia walks into school showing off her fake knock off Prada bag)
Teresa- She thinks she got everyone fooled.
Haylie- Bitch.
Teresa- The dumbass, is a knock-off cow.
Haylie- Yeah, everything she's worn this year is fake.
Teresa- Yup her hair is a knock off of paris Hilton's extention line.
Haylie- (gasp) Damn Knock-off cow!
by Movie girl February 4, 2010
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