look who’s talking | you can/can’t talk | you’re a fine one to talk
(informal)used to tell somebody that they should not criticize somebody else for something because they do the same things too（用以表示自己同样不对时不要批评别人）还有脸说别人
‘George is so careless with money.’ ‘Look who's talking!’“乔治真是乱花钱。” “亏你还有脸说别人！”