apologizer
/ˌæpəˈlɒɡaɪzər/Definitions
1. noun
A person who habitually or frequently apologizes, often to excess.
“The apologizer in the group always seemed to be the one taking blame for others’ mistakes.”
2. verb
To habitually or frequently apologize, often to excess.
“She’s always apologizing for things that aren’t her fault, it’s become a habit.”