agroof

to fall flat on one's face

John was not particularly amused when the the new next door neighbour pointed out that, as he fell off his ladder and made contact with the ground, the sound of him being winded was the same as his action: agroof.  He mustered up as much dignity as he could, picked a piece of sod out of his nose and wheezed "whatever" before limping inside to nurse his wounds and his pride.