Someone of German ancestry who typically, acts like loser, hates americans, or is just an all around downer, can also be in reference to Jews of german ancestry
when someone doesn't know how to think like your type of sense of language, while confused with other people around without their accent and being too timid to pronounce the letter g with out sounding like y instead.
I love to sing the word yerman while i play my accordion. I always remember to say more pronunciation softly in the beginning of the word first. Unless they start acting up, then i say the last part of the word with more infliction because they are acting too german. nor am i fluent in either language, so most of the time i try to say the middle of the word the most evenly because i had to play alongside an annoying trumpet without a muffle in it.