Refers to da voluminous "watering" dat occurs when several big dudes drink copious quantities of Buds and Coors and then majorly "drain their radiators" on da ground afterwards.
In da famous song "Second Week Of Deer Camp" by "Da Yoopers", they speak of da guys having created "a ring of yellow snow" all around da hunting camp due to their frequent intervals of beerrigation throughout their days of indolent debauchery --- "We drink, play cards, and shoot da bull, but never shoot no deer".
An invitation to you feel obligated to send be cause all of the invitees friends are your friends.
Joe 'Hey is Beflok coming to the LAN?'
Chump 'Yeah I didn't want to but I ended up sending him a benvitation. Why are you guys still friends with him?'