[identity profile] elettaria.livejournal.com 2009-07-29 12:31 pm (UTC)(link)
Well, "bumph", also spelt "bumf", comes from "bum fodder" (poor quality printed matter used as toilet paper), and that one's Victorian. I'd expect "bummer" to be something to do with arses, yes.
Edited 2009-07-29 12:32 (UTC)