mail it in
v. phr.— «It didn’t take long to figure out that she was mailing it in, and hadn’t lifted a finger to do research for quite some time.» —by Andy Kessler Wall Street Meat Jan. 1, 2004. (source: Double-Tongued Dictionary)
Further reading
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
Responding to someone during a dispute with What does that have to do with the price of tea in China? is a way to deflect the comment or derail the discussion entirely. While the phrase the price of tea in China is the most common version...