I work in a kitchen and one of the women on the serving line keeps referring to the salad as "salit," which annoys me.
Also, I hate it when I'm washing the dishes and someone tosses a filthy dish with all sorts of shit caked in it in the sink. We have garbage cans and a spray nozel for a reason.
It's even worse when I have a bunch of washed dishes piled up in the rinse sink waiting to be rinsed so that I can move them over to the sanitizer sink and then someone dumps something dirty on top of them, because they're too fucking stupid to look at what's in the sink before throwing more stuff into it.
EDIT: There's also another girl who keeps using double negatives, and whenever I correct her she just doesn't understand what I'm talking about and keeps doing it.