Is LAMER a Wordle Word?

Yes. LAMER is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

What does LAMER mean?

Unable to walk properly because of a problem with one's feet or legs.
Moving with pain or difficulty on account of injury, defect or temporary obstruction of a function.“a lame leg, arm or muscle”
(by extension) Hobbling; limping; inefficient; imperfect.

2 more adjective definitions

Unconvincing or unbelievable.“He had a really lame excuse for missing the birthday party.”
Failing to be cool, funny, interesting or relevant.“He kept telling these extremely lame jokes all night.”

A person lacking in maturity, social skills, technical competence or intelligence

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: GoodIn the top 3% of all valid Wordle words for testing common letters.
Vowels: A, E
Unique letters: 5 of 5
Common letters: L, A, E, R

Hard-mode trap: 11 valid words fit the pattern LA_ER. If you reach it, you may need several guesses to find the last letter.

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.