If it’s one to one I might believe it’s just joking but if there’s an audience it feels like put downs.

If it happens in real life, I try to walk away from those situations. If it happens online, I try make fun back - not by getting into an insult trading contest, but by ridiculing what they've already said. And if they throw insults I make fun of their inability to debate.

Generally, not well. It depends on who it is and how do they tease me. Putting others down has always been my brother's past time activity. I always wished I could found appropriate words to retort back but it's not in my nature to constantly think about ways how to insult other people so as a short-tempered person I used to resort to physical violence. I'm genuinely glad I don't have to deal with that shit anymore. A bit of a banter is fun but not when you just know the other person feeds on your annoyance. That's just fucked up.
When I'm teased by random people on SW or someone who don't show bad intentions I usually laugh or roll my eyes.

I either don’t react or I laugh it off. Depends on the circumstances. When I was younger and made fun of more often, I stopped reacting and they got bored.

it's fine once in a while, but repetitive is bullying behavior.

It's the past. And it doesn't determine who you are as a person. It's over, try to enjoy your life in the present.

Probably agree with them

I usually turned the tables, I could insult myself better than they could.

I'm the youngest, with an older brother and an older sister.
I got used to it.

I take it as banter

Internalize it for the rest of my life

I'm slashing tires

I'm really thick skinned about things like that.