tortoise head 

The name applied to poo that comes out just to say hello particularly in a manner that is unexpected and unwarranted. Ususally happens if you try holding it in for too long.

Damn, I have a tortoise head and I think its touching cloth. Think I better go snap one off before I shit my pants.

tortoise head by Coinage August 20, 2006

Walking Tortoise Head

An extreme case of Turtle Head, in which the victim is forced to take sliding baby steps and clench their butt cheeks in order to avoid a full on pant's crapping episode.

You suddenly realize you have turtle head. You leave your desk and take several steps towards the restroom only to experience the second stage of Turtle Head called, "Walking Tortoise Head". You clench your butt cheeks together and make baby steps praying for the strength and the luck to make it to the toilet in time to release this angry monster.

Walking Tortoise Head by Caedis T Yo May 7, 2011

tortoise-heading 

Needing to poo so urgently that you can hardly hold it in and it feels like the poo is poking out yr cheeks momentarily before sucking it back in.

I gotta shit so bad I'm tortoise-heading.

tortoise-heading by Miejo January 19, 2010