pulled a mark 

When someone has pulled a mark, they have screwed up by making a small error that is usually obvious in hindsight/review, and the error drastically affects the result in a negative way. Pulling a mark is common when advanced math is involved.

I pulled a mark yesterday on my math quiz when I forgot to add a negative sign at the beginning.

pulled a mark by acephoenixgamer January 25, 2018

pulled a marky 

When someone thinks of themself and no one else

It was dinner time and everyone was hungry, mark strolled into the kitchen and made food for himself he just "pulled a marky"

pulled a marky by Thatguysanchez February 1, 2018