This is why dictionaries list more than 1 definition and you shouldn't stop at the first one:
- weak; inadequate; unsatisfactory; clumsy.
a lame excuse.
- Slang: Sometimes Disparaging and Offensive. awkward, dull, stupid, or uninteresting.
- Slang: Sometimes Disparaging and Offensive. out of touch with modern fads or trends; unsophisticated.