From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
rube /ɹˈuːb/
[Am.] Hinterwäldler <masc>, Bauerntrampel <masc>, Bauernlümmel <masc>, Bauerntölpel <masc> [pej.]
Synonyms: backwoods man, country bumpkin, bumpkin, country gawk, yokel, culchie, bogman, hayseed, hillbilly, hick, schlub
see: backwoods men, country bumpkins, bumpkins, country gawks, yokels, culchies, bogmen, hayseeds, hillbillies, hicks, rubes, schlubs