Person 1: Hey man , if your car incar?
Person 2: What the fuck is incar?
Person 1: Y'know, Incar, like a car inside a garage, or like me inside your moms garage ;)
A person who idly watches the labours of others while declining to offer assistance or becoming involved. Traditionally a term used by canal bargees when referring to onlookers found clustering around locks and moorings where barges have to stop and the crew engage in sometimes hard physical activity to make progress.
"Don't stuff up at Five Rise Locks or you'll get a cheer from the gongoozlers"