Neutral:
* Know-it-all: This is the most common and straightforward term.
* Wiseacre: This implies a smug or sarcastic attitude.
* Self-proclaimed expert: This emphasizes their lack of official qualifications.
* Opinionated: This describes someone who holds strong opinions and is not easily swayed.
* Authoritative: This suggests a confident and commanding presence, even if their knowledge is not actually superior.
Negative:
* Pretentious: This implies a false sense of superiority.
* Arrogant: This suggests an inflated sense of self-importance.
* Condescending: This describes someone who treats others as if they are intellectually inferior.
* Patronizing: This suggests a condescending and condescending attitude.
* Snotty: This is a more informal term for someone who is arrogant and dismissive.
* Holier-than-thou: This describes someone who believes they are morally superior to others.
Positive:
* Inquisitive: This suggests a genuine desire to learn and understand.
* Curious: This is similar to inquisitive, but emphasizes a playful and open-minded approach.
* Analytical: This describes someone who thinks critically and systematically.
* Insightful: This suggests someone who has a deep understanding of things.
The best word to use will depend on the specific context and the tone you want to convey.