Don't be dopey, think before you act.

别愚蠢的，行动前要三思。

Don't be stupid; think before you act.

别愚蠢，行动前要三思。

Don't be a fool; think before you act.

别做傻瓜，行动前要三思。

Don't be foolish; think before you act.

不要愚蠢，行动前要三思。

Don't be an idiot; think before you act.

别做傻瓜，行动前要三思。

Don't be such a twat; think before you act.

别做个蠢货，行动前先想一想。

Don't be so impulsive; think before you act.

不要那么冲动的，行动前先思考。

Don't be such a hothead; think before you act.

别这么急性子，行动前先想一想。

Don't be such a jackass; think before you act.

别做个傻瓜，行动前先想一想。

Don't be so birdbrained; think before you act.

别这么愚蠢的，行动前先想一想。