The act of cumming into your partners anus and having them push it back out into your cupped hand. They then proceed to slurp the semen from your hand like a freshly shucked oyster.
Jason and his date wanted to try some Kent Island Oystering.
The act, when intoxicated of shitting and vomiting simultaneously. The international symbol for roostering is sometimes confused with the symbol for “walk like an Egyptian”
Alex: Did you see Matt after the party last night?
Obi: Yeah he was roostering on the front lawn!