Context: a boy tells to a trainer that he wants to become a boxer, so the
trainer starts testing the boy's skills. After seeing that he's strong, the
trainer says "なっちゃねェな". I think it is a contraction of "なんてことはない", but even
so, I don't understand the meaning in this context. Thank you for your help!
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2017-04-10T16:22:44.173
46454
2017-04-10T18:07:09.057
17797
question
meaning slang contractions
Meaning of なっちゃねぇ
It is actually a contraction of
[「なって（い）ない」](http://ejje.weblio.jp/content/%E3%81%AA%E3%81%A3%E3%81%A6%E3%81%AA%E3%81%84)
which means "to be no good". So in your situation, the trainer is saying that
the boy's boxing is no good. Note that is used to say "no good" as in "someone
is not good at something", and not that "someone himself is a good-for-
nothing".

On a side note, 「なんてことはない」 in the same speech pattern as the trainer would be
something like「なんてこっちゃねぇ」 or 「なんてこたぁねぇ」.
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2017-04-10T17:21:30.787
46455
2017-04-10T17:21:30.787
9508
46454
answer
There are a couple of things it could be a contraction of.

になっては（ない）ね

or

になっちゃ（う）ね ＞＞ になっちまう which is a contraction itself of になってしまう.

The ちゃ is a contraction of ては usually like じゃ from では. You also have なきゃ in
the same vein coming from なくては. ～ては（いける・いけない） and ～てしまう are common phrases so
can be shortened. してはいけない、しなくてはいけない、してしまう become しちゃ、しなきゃ、しちゃう etc.
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2017-04-10T18:07:09.057
46456
2017-04-10T18:07:09.057
20531
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answer