This is a mildly humorous indicator for a German of
Polish extraction, although the expression has also been heard in North
America, indicating those of a more general Eastern European descent. Depending on the
tone of speech, the word can be used neutrally, somewhat flattering or even somewhat condescending.
At that
fancy restaurant, the server was a typical Deschi. He had that suave
walk to him, a slightly reserved posture and a somewhat terse speech - but
always courteous and friendly without acting overly subservient.