Codger
/ˈkɑːdʒər/
Definition 1 of 1
Pro Tip 1/3Slightly Disparaging
Codger can have a mildly negative tone, suggesting old age with peculiar habits. 
He's a bit of a codger with his countless garden gnomes.
Pro Tip 2/3Affectionately Teasing
Sometimes used fondly among friends or family to tease about being old-fashioned. 
You're such an old codger, grandpa, with your vinyl records!
Pro Tip 3/3Informal Use
Codger is casual, not for formal writing; more for spoken language or informal texts. 
Our neighbor, the friendly codger, waved hello.