If one person is bummed and the other person is more bummed than that, then that person is bummder.
I told my friend she would be bummed I had a new bracelet but she said when I saw her new bracelet I'd be bummder.
by Jurassica1823 September 3, 2011
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A bunch of people that are really cool but like fingering each other arse holes after one of them has a poo
The bummder brigade
Jack: I think I need a poo
Everyone looks at Jack they then wait for jack to finish his poo then they get a metal pole and sick it up his arse

Jack: oooooooo I like that
by The leader of the Big Bums November 3, 2020
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