Karkat sings operetta
Channel: MetropolitanKarkat
Date: 17/02/2016

From the rich tradition of Alternian musical theater: Karkat's 1NSP1R4T1ON4L SP33CH, as Terezi derisively calls it—he delivers it shortly after his teammates make contact with the humans—was immortalized in the celebrated operetta, The Pyropes of Penzance.  Here, Karkat directs his cohort to troll the humans.

References to the speech, but not the speech itself, are found in Act 5 of Andrew Hussie's Homestuck:

http://www.mspaintadventures.com/?search=6_2

Karkat Vantas and his fellow trolls are Hussie's creation.  Other credits given in the video.