Definitions for ill-advised
Random House Webster's College Dictionary
acting or done without due consideration; imprudent:
an ill-advised remark.
Origin of ill-advised:
without careful prior deliberation or counsel
"ill-advised efforts"; "it would be ill-advised to accept the offer"; "took the unadvised measure of going public with the accusations"
Kernerman English Learner's Dictionary
You'd be ill-advised to go into that part of town.; ill-advised comments
Carried out without the benefit of wise counsel or careful deliberation, or carried out with unwise counsel