n.a coined
term meaning something that is easily accomplished. This is a variation of do something
standing on one's head, literally meaning to engage in some activity while one is upside down, supported by his head. Figuratively, it means to show that whatever activity or
job one is doing is so easy, one could do it while exerting the
effort and
skill necessary to stand on one's head. This expression is usually used when one believes something someone else is doing is quite simple.
(slang) something easily accomplished.