What is Sniffy?
1.
A person who is arrogant and thinks that the subject in question is not good enough for them. They stick their nose in the air as if they smell something disgusting.
"She doesn´t talk to anyone in the office - I think she´s a bit sniffy."
See
2.
extremely pleasurable or hip
That's a very sniffy outfit you're wearing, where did you find it?
