Kibitz

kib·itz (kbts)
intr.v. kib·itzed, kib·itz·ing, kib·itz·es Informal
1. To look on and offer unwanted, usually meddlesome advice to others.
2. To chat; converse.
[Yiddish kibitsen, from German kiebitzen, from Kiebitz, pewit, kibitzer, from Middle High German gbitz, pewit, of imitative origin.]
kibitz·er n.
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