Its your upper lip. Seriously though, that Vinegarish smell is from a chemical used to get the ink particles to stick to some of the dark garments. Everything is fine. that vinegar smell is harmless unless you live in California. In california this chemical will attack you while your sleeping and shove cancer all in you. but its still cool, a little airing and the smell will be gone, just like the aftermath of last nights taco bell.
So Don’t go crazy and pull out the Febreze or industrial cleaners. Any residual smell for those with dog noses a regular wash will remove the remaining smell.