How does 出てます here translate?

Question

Came across this dialogue while reading Japanese writings online.

Boy 1: オタクにじみ出てますよ

Boy 2: 違うっつってんだろ

My Japanese beginner skills would translate it as "Your otaku-ness is bleeding out." But I'm sure that's not exactly right.

Also, I see a lot of ってん in casual dialogues like this. I'm not sure what that exactly means.

Answer 1

I think your understanding of the first sentence is okay. It means something along the lines of "I can smell your otaku-ness", "You are not hiding your otaku trait".

For the second sentence, it's a result of several contractions.

• 違うと言っているだろ(う)
  Come on, I'm saying it's wrong (I'm not an otaku)!
• 違うと言ってるだろ (ている to てる)
• 違うと言ってんだろ (る(ん)だ to んだ)
• 違うって言ってんだろ (って is a casual version of quotative-と)
• 違うっつってんだろ (って言っ to っつっ)