1(coll.) can't do anything about it
2(coll.) couldn't be (better) (i.e. simply wonderful)
3(coll.) there's no way that ...; it's simply not credible that ...
Examples
wǒ我méi fǎ r没法儿gòu mǎi购买suǒ yǒu所有wǒ我xū yào需要de的dōng xi东西。
我没法儿购买所有我需要的东西。
I wasn't able to buy everything I needed.
我没法儿再忍了。
I can't bear it anymore.
汤姆和玛丽就是没法儿和睦相处。
Tom and Mary never got along.