as anything—an intensifier used as part of an informal comparison:
- Natasha was one of these people who’s nice as anything until you don’t do something she says.
like anything—(coll.) do smth. with great energy or enthusiasm:
- He waved to us and we waved back like anything.
Note: The expression is not antonymous in meaning to the phrase like nothing on earth—(coll.)
1. extremely strange; highly unusual:
- You may yet meet with a lumbering native bear, like nothing on earth so much as a child’s woolly toy.
2. feeling or looking very ill or miserable:
- That dreadful period when you’re just coming out of an anesthetic and feeling like nothing on earth is not the time when you want a visitor.