The phenomenon where attempts by outsiders (often older generations, authority figures, or brands) to adopt the language, style, or trends of youth culture are perceived by the in-group as forced, inauthentic, and cringeworthy.
You see that new Geico commercial that used the word Skibidi? That was some Fellow Kids effect shit right there.
Play follow the leader with girls and take off your shirt. Walk up to a group of 7 year olds and rub those nips. They ask if you wanna hang out so you do. You watch 2 girls one cup while eating chocolate ice cream