not a pretty sight often humorous phrase
used for saying that something is very unpleasant to look at
This kind of injury is really not a pretty sight.
Thesaurus: ugly or not attractivesynonym
Main entry: pretty
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informal not a pleasant spectacle or situation
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ˌnot a pretty ˈsight idiom
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You should have seen him in his swimming trunks— not a pretty sight!
Useful english dictionary. 2012.