Country Dictionary

Oral retrieval of semen from the anus.

After shooting a copious load of cum up her ass, Mark buried his face in her ass and began felching his lady love.

To suck out semen from an ass, or less commonly from a twat. Also known as the 'mud milkshake', and the 'sludge slider'

'Jeremy was so horny last night, he begged me to give him a sludge slider while going the reach-around'

to suck your own cum out of another persons ass.

i felched your mom.

To suck or lick one's own semen from the butthole of a partner after anal sex.

"I sucked my cum out of darrens bumhole last night"
"ooh you fucking felcher"

Sucking, licking or eating your own jizz out of your partner anus after an intercourse.

I felched my girlfriend's brother last night and he loved it.

v.t., (from the Welsh: honor; dignity)to suck your own semen out of another man's rectum (preferably with a straw).

Having corn-holed Tom Jones with abandon, I fetched a flexi-straw and felched Tommy Boy 'till he was dry.

The act of orally extracting one's own semen from the anus of another.

I would come up with an example, but I am sure it could not top your mental image.