This is a word I learned by reading and not by studying or in conversation with Japanese.
After learning the kana years ago I had occasion to fly with JAL and the pre-meal snack was a little packet of various savoury crunch things like nuts and what I assume were a kind of rice cracker. Perhaps some included nori. On the pack in hiragana as I recall was written "おつまみ". To what specifically does this refer? I'm often surprised that my Japanophile friends don't know what I'm talking about when I use this word.