know-it-all

Definitions

Someone who claims to be knowledgeable or an expert in something, obnoxiously dismissing the opinions, advice, suggestions, etc. of others.

US, derogatory

Equivalents

Examples

“We had it all figured out, but this know-it-all marched in with "the correct⟳ way of solving it", leaving our experiment⟳ in shambles.”

“The same holds true for supporting details—they help⟳ you to learn⟳ more about a topic. Be a know⟳ it all by sharing these details and supporting details with friends.”

“She's a mean⟳, bossy know-it-all.”

“Have⟳ you ever gone shopping with a Know-It-All girlfriend and she insists, without your consent or consulting you first, to choose⟳ your outfits for you?”

CEFR level