standing on (one's) head(redirected from standing on his head)
standing on (one's) head
With very little or no difficulty; in a relaxed, carefree, or effortless manner. It took me a little while to get used to this job, but now I could do it standing on my head! You should ask Johnny for help—he does this level of math standing on his head.
standing on one's head
see under do blindfolded.