So apparently troll horns can be moved around to make funny shapes

It's Karkat! ....his horns look very phallic though :/

karkat's horns have been replaced with coats. it was only a matter of time.

Karkat saying "my worm are big". I'm pretty sure this is innuendo.

Karkat smiling at the camera, anguish in his eyes as he says "My worm are big." Dave, standing in the background, is disturbed.

Karkat celebrates the fact that his worm denizen is big. Dave looks on in confusion

dave stands by in confusion as karkat successfully defeats his big worm denizen by calling it fat

Apparently Karkat drew the last doodle. It depicts him throwing a "FAT" Worm denizen of low intelligence into the mud as Dave watches on.

Dave is confused and Karkat want to touch the fat