could (do something) standing on (one's) head

Is able to do something with very little or no difficulty, or complete or accomplish something 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 could do this level of math standing on his head.

can do something standing on your head

If you can do something standing on your head, you can do it very easily. All the secretaries here can do the job standing on their heads. She has been playing gigs for so long she can do it standing on her head.

See also: can, head, on, something, standing

Collins COBUILD Idioms Dictionary, 3rd ed.

See also:

able to do (something) with (one's) eyes closed
able to do with eyes closed
able to do blindfolded
able to (do something) blindfolded
able to (do something) with (one's) eyes closed
able to do (something) standing on (one's) head
a/the feel of (something)
(I) wouldn't (do something) if I were you
a straw will show which way the wind blows
a crack at (someone or something)

词组	could (do something) standing on (one's) head
释义	could (do something) standing on (one's) head could (do something) standing on (one's) head Is able to do something with very little or no difficulty, or complete or accomplish something 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 could do this level of math standing on his head. See also: could, head, on, standing Farlex Dictionary of Idioms. can do something standing on your head If you can do something standing on your head, you can do it very easily. All the secretaries here can do the job standing on their heads. She has been playing gigs for so long she can do it standing on her head. See also: can, head, on, something, standing Collins COBUILD Idioms Dictionary, 3rd ed. See also: able to do (something) with (one's) eyes closed able to do with eyes closed able to do blindfolded able to (do something) blindfolded able to (do something) with (one's) eyes closed able to do (something) standing on (one's) head a/the feel of (something) (I) wouldn't (do something) if I were you a straw will show which way the wind blows a crack at (someone or something)
随便看	be careful not to (do something) (be) careful what you wish for(, (because) you just might get it) be careful what you wish for(, it might (just) come true) be carried away be carried out feet first be carved in stone be carved/set in stone be cast in a mould be cast in a (some kind of) mold be cast in cement be cast in concrete be cast in the same mould be caught flat-footed be caught in a time warp be caught in the act be caught in the crossfire be caught in the middle be caught napping be caught off (one's) guard be caught on the hop be caught on the wrong foot be caught short be caught/taken short be caught with chaff be caught with (one's) pants down