1. sth that is too extreme
the idea/proposition/amendment was a step too far
If you take something 'a step too far' it means you are crossing a boundary or 'crossing the line' of what is acceptable. This could be taking advantage of something or pushing someone or something to the limit: "Our daily spending limit is generous but some of our employees are taking it a step too far." "I agree with disciplinary action, but I think laying people off is a step too far." This is a phrase you will hear in social and professional contexts. Similar expressions include 'crossing the line' and 'pushing it to the limit'.