Green’s Dictionary of Slang

panning n.

[pan v.1 ]

1. very harsh criticism, e.g. a very bad review.

[[US]Marysville Herald 7 Aug. 1/5: We apprehend that the candidates will undergo a system of panning, tomming and sluicing too through to pass current, if they should prove light or worthless [DA]].
[US]B. Fisher A. Mutt in Blackbeard Compilation (1977) 87: He was very indignant and gave the big retired champion an awful panning for running around using his name.
[US]R. Lardner ‘Horseshoes’ in Coll. Short Stories (1941) 255: Speed sure got a pannin’ in the clubhouse [...] Everybody in the club roasted him, but it didn’t do no good.
[US]D. Hammett ‘Tom, Dick, or Harry’ in Nightmare Town (2001) 241: One who had learned to take his pannings as an ordinary part of married life.
[US]D. Lamson We Who Are About to Die 238: The Parole Board took a fearful panning, which they by no means deserved.
[US]Time 7 Mar. 58/3: The campus paper even set itself to a brisk panning [DA].
[US]W. Winchell On Broadway 4 Aug. [synd. col.] He (or she) gets a part in a show and a panning from the critics.
[US]R. Giallombardo Study of a Women’s Prison 110: ‘Panning’ is general derogatory gossip about an inmate.

2. (US Und.) a beating.

[US] ‘Jargon of the Und.’ in DN V 458: Panning, A beating.