The act of ejaculating on someones dvd copy of either of the two Scooby Doo Movies and then screaming zoinks at the top of your lungs.
Shaggy was beating off a nutt in the mystery machine right onto a dvd copy of Scooby Doo 2 : Monsters Unleashed.
The rest of the gang could hear zoinks being screamed from inside the house.
Therefor Shaggy was Zoinking.
Merge of "Zoom" + "Drinking". Due to Shelter in Place ordinance amongst the COVID-19 crisis, a new norm of socializing - drinking at home while logged into a Zoom (online conferencing platform) session with other folks, cameras on and beverages in hand.