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.