Green’s Dictionary of Slang

bumly adj.1

[bum adj. (1)]

(US) depressed.

[US]K. McGaffey Sorrows of a Show Girl Ch. xx: As I was going to kick into some other country that I wasn’t hep to I naturally felt kind of bumly.
[US]J.P. McEvoy Showgirl 235: I naturally felt bumly.
[US]‘Jennifer Blowdryer’ Modern English 9: bumly[...] Kind of bummed out, real sad.
S. Knight at Stone Circles 28 July 🌐 I am feeling better overall and am going to try to be online more, but it seems I’m going to be of the non-bumly sort for a while.