One man gets on his hands and knees and bends his dick backwards so the other man kneeling behind him can suck his dick and blow air on his asshole thus dusting the english.
Can also be described as one man down on his hands and knees and with his ass in the air gets jerked off from behind while having his asshole eaten out.
see also "hand me down reach around"
I had a really great time the other night, after we went home I gave him an english duster
I really think our relationship is going to work out everytime we fight I give him an english duster
and we go walk our dogs in time for sunset