Shady past noun phrase informal
Used to indicate a dubious, suspicious, or potentially immoral or illegal past history.
I don't want to marry Jimmy, who has a shady past like that.
Jackie always feels ashamed of his shade past.
Bin concealed his shade past from his wife, which infuriated her.
Used for saying that there is something suspicious or wrong
To be extremely skeptical of someone
If you describe someone as shifty-looking, they seem dishonest, untrustworthy, or suspicious.
To distrust someone.