courir sur le haricot à quelqu'un

to get on someone's nerves

Used to describe someone who is annoying or bothering you.

Avec ses remarques constantes, il commence vraiment à me courir sur le haricot.

With his constant remarks, he's really starting to get on my nerves.

Mixes three things: 16th century 'courir quelqu'un' (to pester), the 19th century verb 'haricoter' (to nitpick in business), and early 20th century slang where 'haricots' meant toes. Running on someone's toes became running on their bean.