KTF meaning in Community ?

Kermit the Frog is a Muppet character created and originally performed by Jim Henson. Introduced in 1955, Kermit serves as the straight man protagonist of numerous Muppet productions, most notably Sesame Street and The Muppet Show, as well as in other television series, feature films, specials, and public service announcements through the years.

Henson performed Kermit until his death in 1990, and then Steve Whitmire performed Kermit from that time until his dismissal in 2016. Kermit has been performed by Matt Vogel from 2017. He was also voiced by Frank Welker in Muppet Babies and occasionally in other animation projects, and is voiced by Matt Danner in the 2018 reboot of Muppet Babies.

Kermit performed the hit singles "Bein' Green" in 1970 and "Rainbow Connection" in 1979 for The Muppet Movie, the first feature-length film featuring the Muppets. Kermit's original performance of "Rainbow Connection" reached No. 25 on the Billboard Hot 100 and was added to the Library of Congress’s National Recording Registry in 2021.

Kermit's iconic look and voice have been recognizable in popular culture worldwide since, and in 2006, the character was credited as the author of Before You Leap: A Frog's Eye View of Life's Greatest Lessons, an "autobiography" told from the perspective of the character himself.