Jackassy
Being so dumb you think you're the smartest person ever. You're Jackassy if you argue about the sky being blue, take credit for someone else's work, and still think your dumb ideas are genius.
I argued with my teacher that the sky is actually purple. Jackassy at its finest.
I took credit for my friend’s math test. Jackassy extraordinaire.
I said my dumb idea was the best. Jackassy for life.