One who performs strategic transport planning with a box of coloured crayons/pens, using them to draw lines on a map, without thinking through the implications.
"He thought of a way of linking two train lines together without any thought of how it could be achieved. He is such a Crayonista"
When a person is bad at everything and increasingly stupid the you assume that he/she eats crayons for enjoyment.
Yesterday Cody started yelling at me for stealing his phone when it was in his hand the whole time, and i thought to myself: He is one crayon eating motherfucker.
A sticky turd that can't be nipped off cleanly even by the strongest nipsy and every wipe leaves a thick brown stripe down the paper until the wiper gives up and resigns himself to a day of anal discomfort. See Golf Arse
Where's all the toilet paper gone, that was a new roll this morning?