That's pêteux, not péteux; no acute accents on A in French, and the grave accent is only on the word à, doesn't occur within words.

I remember hearing someone use the word portmanteau (in French, literally: coat carrier; means: big suitcase, or trunk) in English and was mightily confused for a while - you use a big, composite word and somebody says it's a suitcase? But I got there eventually.