The Brief: IKTR is an abbreviation of "I know that's right."

DEEP DIVE
IKTR is an abbreviation for “I know that’s right.”
This phrase is used when someone is in agreement with another individual’s opinions or whatever another individual is doing, typically a serve on social media.
cuz why did her last album and the deluxe have nothing but hits?! iktr!! pic.twitter.com/aPmNR6F1XD
— ony π± (@onyekasc) February 23, 2021