"On fleek"? These professors can't even, but they do feel bad for everyone being on top of someone named "Fleek."
Lehigh University asked faculty members to try and explain what various modern slang words mean, covering everything from "on fleek" and "FOMO" to "bae." One professor said they used to think "bae" was just short for Beyoncé, which is fair, because she is the world's bae.