"He was going on about how late he was in the beis last night, and I was just like, 'T4'."

"Sarah emphasizing that she washes mayim achronim was such a T4."

"And I want to share this story because it’s really a story and I don’t want it to be misunderstood; this is not, as my students would call it, a T4 flex. T4 being an abbreviation for therefore, where you just kind of tell a story that makes you look good." (source)