system
A chat on subreddit /r/me_irl
human
At this point I have no idea what meirl means and I'm too afriad to ask.

Edit: Just going to copy-and-paste R1 here: 

&gt;R1: Not them irl  
Posts should be an attempt at easily relatable analogous ***comedy***. Just because it's funny doesn't mean it's suited to this subreddit.
gpt
It just means that the person who posted that agrees with the original comment. In this context it means that the poster is agreeing that they would "throw hands" (fight) with any one who harm a kitten. In this instance is it a the original commenters kitten. Pretty much universally people like animals and it is common consensus that pretty much all of us on earth hate animal abuse, so we relate the the original commenter that we would be very upset if someone hurt a innocent animal. People tend to take animals as more straightforward as they don't talk, are loyal and unless trained to be aggressive only bite people out of fear or distrust for previous incidents humans have done to them.