Jamie

Verb: to copy someone's idea or steal someone's memes and take complete credit for it. Done by unoriginal people who can't think for themselves, you will often say something out loud and the person will repeat what you said and not even realise you were the one that said it first.

Adjective: someone who copied your idea, or someone who is being an idiot

Person 1 - Hey, mate, does your bog water swirl?
Jamie - Hey, mate, does your bog water swirl?
Person 1 - I just said that
Jamie - No you didn't, I said it first