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I'm playing a video game and in this scene the character is on a hill and
says:

> このまま昼寝しちまおうか

My guess is that it's a conjugation of する but it doesn't look close to する at
all.

What conjugations are present in that word and how does it affect the
sentence's overall meaning?
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2013-12-31T06:40:37.410
13963
2014-01-03T14:58:04.947
3392
question
grammar translation meaning conjugations
What is the meaning of しちまおう?
Like snailplane commented, it is a contracted form of して しまう.  
I would add that the final ～おう marks the volitional form of しまう. If that can
help you understand better the sentence, an other very similar way of saying
it would be:

> このまま昼ねを して しまいましょう か
CC BY-SA 3.0
2014-01-03T14:58:04.947
14021
2014-01-03T14:58:04.947
1319
13963
answer