Francophonie· easy
avoir la chair de poule
“to have chicken flesh”
Meaning
To get little bumps on the skin
Explanation
Your skin puckers up in little bumps, just like a plucked chicken, when you're cold, scared, or genuinely moved by something.
Example
Ce film d'horreur m'a donné la chair de poule du début à la fin.
That horror film gave me goosebumps from start to finish.
Origin
It started as 17th century medical language, when 'chair' (flesh) was the word for skin. The bumps that rise on cold or frightened skin look just like a plucked chicken, and the phrase eventually left the doctor's vocabulary for everyday use.
Source