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I'm trying to understand the [lyrics of a closing song of
「崖の上のポニョ」.](http://blogs.yahoo.co.jp/moe_0908/42274649.html)

First verse is simple, but the second stopped me:

```

    ペタペタ　ピョーンピョン
    足っていいな　かけちゃお
    ニギニギ　ブンブン
    お手てはいいな　つないじゃお
    
```

What happened to arms and legs?
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2012-02-23T04:58:43.490
4781
2015-06-29T16:18:53.707
2015-06-29T16:18:53.707
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question
colloquial-language song-lyrics contractions
What are these forms: かけちゃお, つないじゃお?
かけちゃお = かけてしまおう

つないじゃお = つないでしまおう
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2012-02-23T05:12:28.430
4783
2012-02-23T05:12:28.430
1065
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answer
They're contracted from かけちゃおう and つないじゃおう, which are colloquial versions of
駆{か}けてしまおう and 繋{つな}いでしまおう, "let's run" and "lets connect", in this case 手を繋ぐ,
"hold hands"

The auxiliary verb しまう usually means "do something accidentally", but in this
case in the volitional form, it's used to express carefreeness.

> 手を繋いじゃおう Let's hold hands (and not care about the consequences)

A similar use is in the imperative

> やっちゃえ！ Do it (and worry later)!
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2012-02-23T05:17:18.443
4784
2012-02-23T05:17:18.443
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answer