T4 is short/slang for “Therefore what?” It is commonly used in the yeshivish world in order to let a yeshiva bachur know that what he is saying is totally unnecessary and is just a major flex on everyone else. Although T4 is sometimes used by seminary girls, in reality, it is not built for them and they should never really use the word unless given permission by a bachur because it was created furda.
1. Arieh: Hey guys, do any of you know how to lock up the bais at night if I’m the last one there? Also does anyone know if a new volume of shas is coming out anytime soon? I finished shas like 7 times already without using an artscroll.
Chaim: T4 dude. No one likes to see that. Get outta here!
2. Maxwell: *writes in groupchat* Guys check out my new song. I have the best voice ever. My songs are 🔥.
Lein: C’mon man, T4. No one is trying to dance with you ever.