a bit thick

informal More forceful or critical than is fair or necessary. Primarily heard in UK. Well, I think "leech" is a bit thick, but I concede that I benefited from your hospitality longer than I should have. It seems a bit thick of them to strip you of your license completely; a suspension seems much more appropriate. Whoa, isn't expulsion a bit thick for a first offense?

a bit thick

more than you can tolerate; unfair or unreasonable. British informal

1991 Alistair Campbell Sidewinder I thought this was a bit thick, and to begin with I tried to defend myself.

a bit ˈthick/ˈstrong

(old-fashioned, British English, informal) not fair or acceptable: It’s a bit thick of him to expect me to pay every time we go out together. ♢ She said it was the worst book she’d ever read, which I think was a bit strong.