One who participates in much cock-blocking, as well as random acts of douche-baggery.
Man 1: Yo did you hook up with that chick last night?

Man 2: Nah, my friend was being a complete Jack Ross.
by BiggieSmalls121 July 22, 2010
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When you're on a live meeting, but you don't realise that your mic is on, and end up accidentally blasting your video game gunshot noises to the entire class, and screaming about how you're "fuccin dogin' it"
"Calum did a Jack Ross in English today"

"Ah, thats gotta hurt"
by Class jack of all trades May 30, 2021
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a boy who has a very small pe pe and is a very good a rolling people in the street for there TNs
boy one: look there is a jack ross rolling that kid for his shoes

boy two: ohh let's call the cops
by thanos dies in end game April 25, 2019
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