полтора землекопа

Etymology
lit. 'one and a half diggers'; referring to a common textbook word problem about the number of diggers required to dig a ditch if the diggers are working at some fixed rate for a certain length of time; popularized by a 1965 children's book and a 1969 cartoon.

Phrase

 * 1)  one man and his dog, one or two people a very small group
 * 2) an obviously absurd mathematical result
 * 1) an obviously absurd mathematical result