But-boy noun
Used to refer to a man that often voices objections
I’d rather be a but-boy to voice my opinion than a man that says yes to everything.
You are such a but-boy. Can you agree with me even for once?
An intense argument
Not agreeing with or having an understanding of someone or something
The idea of the noun may be based on the meaning of “but” - a word used to introduce something which contrasts with what was said before.
Used to allude that the last force, problem or burden which is seemingly minor and small causes a person, system or organisation to collapse or fail
Her husband's violent act last night was the straw that broke the donkey's back and she left him