This had probably meant for showing love and affection = Itachi to Sasuke. This could not have been some type of jutsu or funny way of saying "not right now". For Itachi maybe, but it states in season 3 that since Sasuke had tapped Sakura, I'm sure he didn't mean to give her any chakra.
Stating above, this could not have been a jutsu. Personally, I think it's just a nice way of telling somebody how much you care for them without doing their bidding because Sasuke had asked Itachi to help him and he wanted to say no in a caring way, just as Sakura told Sasuke to stay, and as Sakura does to their child Sarada to show her caring as shown on these images on PhotoBucket and Tumblr.