When you find yourself thinking about, in love with or infatuated with someone you follow on Instagram that you may or may not know in real life.

someone who is sexy beyond mean

to instantly find yourself fawning over that one hottie with the sparkling eyes, and that beaming smile. you probably don't know their name, and they probably don't know yours, but who cares its infatuation at a first glance. its not necessary to know much about that person, besides the fact that they're oozing in appeal.

When you instantly gain a crush on someone, or something.

Sounds far less sappy and weird than 'love at first sight' and probably smoother to use in a sentence as well.