#diction #colloquialisms #writingCommunity #uk 
If 'innit' is British colloquial for "isn't it," is 'dinnit' colloquial "doesn't it?" 

 @6e9427cf That'd be "dunnit," at least here in the Midlands. 

 @6e9427cf I only know "dunnit" as in "whodunnit" (who done it)