1 definition by Team mashface
Used by people who think they are too cool for school (but they aren't) as a form of exclamation!
Girl: "My uni timetable is finally been released, McYays!!"
Boy: "i can't beleive you used the word 'McYays', you suck"
Boy: "i can't beleive you used the word 'McYays', you suck"
by Team mashface March 5, 2010