Other forms: lamed; laming; lamer; lames; lamest
You might describe a limping dog that's lost the use of one of its legs as lame, which means "disabled in a leg or foot."
It's less common than describing injured animals as lame, but sometimes you'll hear the word lame used to describe a limping person too. This usage is generally considered to be outdated or inappropriate. Lame is probably most often used to mean generally weak or pathetic — but many people consider this usage to be offensive as well.