Lamest

adjective

1. Unable to walk properly because of a problem with one's feet or legs.
2. Moving with pain or difficulty on account of injury, defect or temporary obstruction of a function.

   "a lame leg, arm or muscle"

3. (by extension) Hobbling; limping; inefficient; imperfect.
4. Unconvincing or unbelievable.

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

5. Failing to be cool, funny, interesting or relevant.

   "He kept telling these extremely lame jokes all night."