whats the meaning of "dotesmite"?? im not a native speaker, i have zero clue what it means

I spent too much time trying to find a definition and figure out what you’re talking about.  But it’s actually just two words mushed together.

Dote: be extremely and uncritically fond of.

Smite: to strike with a firm blow

Basically Dad was being very firm with his affections and offerings of cake which only infuriated John further