A verb made for rats, literally that's it.
Can be for a rat running out of a place, doing rat stuff, yknow
"Look! That rat is ratting out of the room!" that rat is running out of the room.
Someone who does out of pocket hood rat shit but nobody knows
Yo, Chris is doin some pocket rat shit around the corner.
A girl/guy that likes you eat and or tongue someone anus.
"I rat sharked my friends brother."
Someone (usually a young white male) who hangs around the an Anglo-Catholic church, volunteering for every liturgical role and relishing being an insider.
I know he can be a pain, Father, but if it wasn't for Bill being a real sacristy rat, we wouldn't have a subdeacon.
Meaning when someone is unpubic or hasn't reached puberty
Shut up you hairless rat
Very rational but super dumb and funny but ignorant and beautiful
Me: oh hey hairless rat!!!
hairless rat: bro wtf I’m not that much of a hairless rat!!