Wiktionary
bummest
a. (en-superlativebum)
Usage examples of "bummest".
Mother of God, never in my bummest trips did I imagine that the road to immortality would take me through so many heaving female bellies!
Arlo, I have to tell you, concisely, I think you are the bummest trip I have ever been on.
You know, Arlo, I have to tell you, concisely, I think you are the bummest trip I have ever been on.