a bit thick/strong

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.
See also: bit, thick

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.
See also: bit, strong, thick