Adverb
In a manner or to a degree beyond endurance; intolerably; as, a blaze insufferably bright; a person insufferably proud.
Source: Webster's dictionaryWho or what are you? Besides insufferably rude? Garth Nix
I was an unusually private person - in a way, kind of insufferably so. I think I thought the celebrity thing when it happened was a temporary phenomenon, and I was above it. Jane Pauley
it was insufferably hot in the room Source: Internet
Controversial feminist Camille Paglia slams 'insufferably smug and entitled' Facebook COO Sheryl Sandberg for 'hiding her servants and nannies' Source: Internet
One insufferably "alternative" guy I went to school with had a giant R.E.M. tattoo on his back. Source: Internet
Here’s the thing: I know I’m making this play seem insufferably brutal and grim. Source: Internet