Don't forget the emotional, psychological bullying, where they're not even sure if you're bullying them or if they're just a sensative little bitch that needs to thoughen up. Like if someone told you "jesus bro, you didn't tell me your mom was such a hot cunt. I mean look at her tits, look at them! I bet she's sucked some cock, or been made to....whoa whoa lighten up, I'm just saying 😂 god no need to take it so seriously" that doesn't involve any physical violence and can even end with him feeling like he needs to say sorry, but it's absolutely bullying.
Sending someone home with a black eye and "looser bitch" written on his shirt is fun, but making him constantly questioning himself and telling himself he's a looser does far more long term damage (and makes it easier to get him to invite you to his house and have him sing your praises to his mom with the fuckable tits)