Would argue with a fence post

Meaning

Used to describe a person who is so stubborn or fond of conflict that they will pick a fight with an inanimate object if no human is available. It is a polite way of calling someone a contrarian.

Amused, judgmental

Used in a sentence

• Don't bother debating him, he would argue with a fence post.
• My uncle is so opinionated he would argue with a fence post.
• She is sweet, but she loves to debate and would argue with a fence post.