Definitions:

1. A person who offers opinions or advice on subjects they know little or nothing about. NOUN
   • He's a classic ultracrepidarian, always chiming in on medical issues with no background in science.
2. Describing someone who speaks or comments beyond their expertise. ADJECTIVE
   • Her ultracrepidarian remarks during the panel discussion where quickly dismissed.
3. Of a critic, giving opinions on something beyond his or her knowledge. ADJECTIVE
   • Most patients are ultracrepidarians when it comes to medicine.

Synonyms:

• know-it-all
• meddler
• overconfidence
• pseudo-expert

NearBy Words:

• ultracrepidarianism