Kansai for んだ, the ending that explains or insists: 違うんだ becomes ちゃうねん, 知ってるんだ becomes 知ってんねん. It is the ねん in なんでやねん.
Kansai dialect. Casual.
One man complains that every time he goes on a diet, his partner gets in the way and keeps feeding him.
That's why I fail.
Textbookだから失敗するんです。Kansai 「〜ねん」 replaces the explanatory 「〜んだ」: 「失敗するんだ」 → 「失敗するねん」, giving the reason.
After a confused exchange, one performer excitedly announces a great idea and starts to explain it.
That makes no sense.
Textbook意味が分からないんです。Kansai speech: "分からない" becomes "分からん", and explanatory "んだ/のです" becomes "ねん"; the particle "が" is dropped.
One person keeps saying it "turned out fine" after doing impossible things, and the other keeps complaining that they ignore flags and physics.
Culture note In Japanese slang, a "flag" (フラグ) is a line or action that normally signals what will happen next, like a "death flag" in a story.
What have you been going on about this whole time?
Textbookあなたはさっきから何を言っているんですか。「言っている」 is Kansai 「言うてる」, and 「〜んだ／〜んですか」 becomes 「ねん」 (「言うてるねん」); the 「る」 before 「ね」 then shrinks to 「ん」: 「言うてんねん」.
From other routines in the library. Automatic transcripts, not yet checked line by line.
〜ねん means “…you see” (Kansai). Kansai for んだ, the ending that explains or insists: 違うんだ becomes ちゃうねん, 知ってるんだ becomes 知ってんねん. It is the ねん in なんでやねん.
With friends: OK. With coworkers: careful. With a boss or teacher: avoid. Kansai dialect. Casual.
In 1,905 live comedy routines, 〜ねん appears in 644 lines from 90 comedians.