Boris bus

Boris bus is the nickname for the New Routemaster bus introduced in London under Boris Johnson's mayoralty (2012). Standard British vocabulary. Not concerning. If your kid uses it constantly, ask them where they first heard it, not to police their speech but to understand which online community they are in. Most slang of this kind moves through TikTok and group chats, so seeing it in your child's vocabulary just means they are plugged into normal teen internet culture.

Boris bus is informal British English for the New Routemaster double-decker bus introduced in London during Boris Johnson's mayoralty (2012). Use in British transport and political contexts. Formal equivalent: "New Routemaster." Common non-native mistake: capitalisation. The phrase capitalises "Boris" (as a name) but "bus" is lowercase. Read or listen to the word in context several times before trying it yourself; the right register is harder to learn than the dictionary meaning.