To ash is to delete and completely restart an assignment/task in the hopes of improving on the previous body of work.
"Last night I did an ash on my English essay"
"I heard Jimmy ashed his physics prac...what an idiot"
"I really want to ash this assignment"
"I heard Jimmy ashed his physics prac...what an idiot"
"I really want to ash this assignment"
by Crackers! March 31, 2009