A CSGO Youtuber from A̶u̶s̶t̶r̶a̶l̶i̶a New Zealand with a bunch of faggot friends that got successful thanks to onedude talking about taco children... I'm not jealous.
"You watch that Fitz video yesterday man?"
"DON'T TAKE MY KIDSMAN! NOT SPICEY!!"
Means "son of" (hence all the English surnames like Fitzpatrick, Fitzhenry) but can also refer to an illegitimate child, a bastard, someone born out of wedlock etc.