revert to type

if someone reverts to type, they return to their usual behaviour after a period of behaving in a different, usually better, way After several weeks without saying a rude word to anyone, he seems to have reverted to type.

Common Names:

Name	Pronounced	Usage
Hachirou	hah-chee-ṙo:	Japanese
Yoana	-	Bulgarian
Elvar	-	Icelandic
Sullivan	['sʌlivən]
Akbar	-	Arabic, Persian, Urdu, Indian (Muslim)
Doruk	-	Turkish