A creator named Jill (@jillybees) took to TikTok to share her experience meeting the Affleck who isn't Jennifer Lopez's husband. "So the context for this is I work in a Boston tourist trap and we have these 'wicked smart' tees," she says at the beginning of her video.

One day at work, a woman approached the register to ask her where the expression "wicked smart" originated. Jill told her that it was an inside joke about Boston accents.

However, apparently that answer was not good enough for the woman's boyfriend. From across the store, he asked, "but where did it come from?"

Jill reiterated her answer, to which the man said "No, I said it in a movie." His girlfriend fired back at him, "Casey, stop." As Jill tried to make sense of everything, she realized that this man was Casey Affleck.

Casey continued to chat. "It's about a 25-year-old phrase — how old are you?" he asked Jill. She responded 22. He then told her he said it in the film Good Will Hunting and asks: "Is that popular around here?"

Meanwhile, Casey's girlfriend begged him to stop badgering the workers.

As Jill ends her TikTok, she says, "He was clearly very upset that we did not know who he was." She also noted that he was "b----ing and complaining" about the price of the sweaters his girlfriend wanted and made her put one back.

At the very end of the clip above, you can witness Casey saying the iconic line as he acts as a wingman for his brother's best friend in front of some women at the bar.

But, per some folks on TikTok, Casey didn't actually coin that phrase.