To, at the last minute, pull something out of your ass. To make the last minute efforts to achieve of pass a goal.
silver hawk (verb ) - to absolutely pull anything and everything out of your ass at the last second. silver hawk is commonly mistaken with bs'ing; for silver hawk(ing) ends in a slight victory , albeit a win none the less
John had totally silver hawked his economics exam and he got a D. Atleast he passed.