To seek help and attach oneself to others when in need, but abandon them and become arrogant when one becomes successful; to be opportunistic and ungrateful.
他这种饥则附人，饱便高扬的作风，让周围的朋友都对他敬而远之。
His tendency to cling to people when in need and then act arrogantly when successful caused all his friends to keep their distance.
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