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
Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...