It's a fraze that came from jasmine master's youtube video. You say it when you're suprised or when "the tea is spilled". It's origins are stan Twitter but VSCO girls use it more often
person 1: I'm bad at writing examples
person 2: and i oop-
A term 13y/o VSCO girls with oversized shirts or hoodies with the smallest pair of Nike Fitness yoga pants with their hydroflask and checkered vans and their checkered iPhone case to say towards an unfunny joke that their dumbass friends say, to make them seem more to "internet trends" but the thing that they're following is some retarded shit that they'll mostly forget
Dumbass friend: *tells unfunny joke*
VSCO girl: "and i oop skskskskss *drops hydroflake with iPhone* and i OOP-"