(2) (vb) to do something impressively badly, preferably when there is an audience to witness and berate you for how badly you did it.
(3) Scrangeometer (n) a dial that accurately measures exactly how scrange-worthy any action or situation might be.
B: And it rained all day.
C: And they'd run out of Fudge Brownie Ice cream in Sainsbury's.
A, B and C: Scraaaange!
(2) Sorry, I've completely scranged this up. You'll have to bin it and start again.
(3) Eeek! I think that's about a 9.5 on the scrangeometer.
(2) Or, an individual who takes from a communal pile while neglecting to contribute anything back.
(2) Andrew continues to drink with us every night, but he never brings any beer or liquor, what a scrange.
"I love you, Miss Eliza. From the very moment I saw you, I was assured that I had found the woman of my dreams. I love you from the depths of my soul, and always will. Now take that dress off so that I can lick the scrange from your twat, you dirty fucking bint."
Pride And Prejudice, Jane Austen.