Definition from Wiktionary, the free dictionary
Alternative forms 
- (idiomatic) A placeholder or generic thing.
- It's a poor system, because if you want to do such-and-such you must first find that function in a long and disorderly list.
- unstated; given
- I am troubled by the rush of young researchers attempting to prove that females are not inferior to males in such-and-such an ability or such-and-such a trait, especially when it is by no means clear what difference it makes.