A person or a thing that is lame is weak, unoriginal, or just not very good.
Dan came up with a lame excuse for why he was late. (His excuse was bad, or it was obviously false.)
That movie was lame. (It was a bad movie. Overall, it was unoriginal and the acting was terrible.)
Mr. Smith’s teaching style is so lame. (It’s not interesting. It’s not effective.)
Todd made a lame joke about people from Tennessee, but no one laughed. (He made a stupid joke.)
That was a really lame answer to the question.
That’s so lame. (Or, "That’s so weak." Both words, "lame" and "weak" are popular, especially among young people, when describing a situation that seems false, phony, or lacking in credibility.)
The word "lame" is also used when a person is physically weakened or an animal is injured.
The man was shot in the leg. His leg is lame.
Sometimes there no other choice but to euthanize an animal that’s lame. (They animal must be killed because an injury is to severe.)
Weakened by hunger and fatigue, the lame traveler got off of his horse and sprawled out on a small patch of ground where he expected to die. Eventually, he was saved.