kibitzer

[kib-it-ser]

a spectator at a card game who looks at the players' cards over their shoulders, especially one who gives unsolicited advice.

a giver of uninvited or unwanted advice.

a person who jokes, chitchats, or makes wisecracks, especially while others are trying to work or to discuss something seriously.

Origin of kibitzer

From Yiddish, dating back to 1925–30; see origin at kibitz, -er¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

My kibitzer came stalking out of the building, gangling and gawky.
Card Trick
Walter Bupp AKA Randall Garrett

Word Origin and History for kibitzer

1927, agent noun from kibitz.