This one is not exclusively for cycling, but since I caught it from a race commentary yesterday, it’s legit. To ‘have ants in your hands’ is to have pins and needles and maybe numbness. This is an all-too-common problem usually caused by an incorrect position on the bike.
Incidentally, what I heard Cyrille Guimard saying yesterday was that a rider in the breakaway ‘…a des fourmis dans les jambes‘ (legs). I’m not sure how he knew that, but he’s been in cycling for about 2 centuries, so I suppose he knows it when he sees it.
Later that day…
Thanks to Rich we now know that what Cyrille Guimard was saying on TV yesterday made perfect cycling sense: avoir des fourmis dans les jambes means that the rider in question was “itching to attack”.
In the end this actually was cycling jargon. I just got my appendages wrong.