Think twice about doing something - Idioms by The Free Dictionary
think twice about something/about doing something (redirected from think twice about doing something)
think twice about someone or something
to give careful consideration to someone or something. Ed may be a good choice, but I suggest that you think twice about him. You will want to think twice about it.
(not) think ˈtwice about something/about doing something (not) think carefully before deciding to do something; (not) hesitate: You should think twice about employing someone you’ve never met. ♢ If they offered me a job abroad, I wouldn’t think twice about taking it!