бугръ. Hmm, are you sure it was written exactly like it? I suspect it might have been бугры. If it was indeed бугръ, then you came across a word from before the Russian revolution in 1917. In those days they added ъ to any word that ended with a hard consonant.

Anyway, whatever that was I presume the word means бугор, which is a hillock or anything small protruding from an even surface of something, like a lump on somebody's skin for example.