lame

If you are lame you are not able to walk well because of a problem with one's feet or legs. This term could sometimes cause offense.

Example: Because I broke my leg and it's in a cast, I'm going to be lame for a while.

If it is lame it is not convincing or believable.

Example: He had a really lame excuse for missing the birthday party.

Something that is lame is not cool, funny, interesting, fun, or relevant.

Example: He kept telling these lame jokes all night.