To think my brother's a bell-end?

[Ambernectarine22]

He recently started an argument with me about which year I was born in, even asking me "Are you sure?" at one point! He also messaged me to ask whether I was feeling guilty about our mum's recent death as I didn't have a great relationship with her...

Sounds like grief has made him a bit loopy.

Some people enjoy being antagonistic. He probably thinks he’s really edgy and interesting.

But yes, very annoying.