The phrase "hookup culture" refers to casual sex or uncommitted sexual encounters — you know, good old-fashioned consensual sex just for the sake of it. Way back when, before Tinder became a thing, people would rely on chance encounters or social gatherings (mainly parties or bars) to meet someone for a casual fling. But now, with the huge pool of dating apps available, we've found ourselves firmly in what we'd like to call our hookup culture era, and finding a partner is as easy as swiping right on a profile photo.