When somebody makes an extremely unfunny joke.
"2 Tomatoes were crossing a roa-" "Dude stfu stop doing a Jonas"
"He just did a Jonas"
A "horny nigga". A person obviusly doing simp things.
Example: Sitting next to the girl with big tits in class, on purpose.
Pronounced: H, N.
"Joe is such a HN"
"What a HN"