Green’s Dictionary of Slang

bumly adj.2

[bum n.3 (2)]

pertaining to the world, lifestyle, or image of a tramp or hobo.

‘Me and Joe’ University of Maryland 🌐 Me and Joe saw some bums. We like bums. 67 bums sitting together doing bumly things like boozing, complaining and pointing at things.
thingsihate.org 🌐 Later, when the bum was sleeping in Golden Gate Park, the Punks clamped the zipper on his sleeping bag and lit him up. Fortunately, he survived to go on to greater bumly exploits.
heathen.net 🌐 As i am standing there waiting, i see an old bumly guy on the other corner directing traffic. he is ecstatic! smiling and waving his arms about, telling which cars can go and which have to wait.