quad coupe 

A car with two long front doors, and two short back doors, with no pillar in between. These cars have 4-door usefulness with 2-door looks.

The Mazda RX8 and the Saturn ION RedLine are two excellent examples of the quad coupe concept.

quad coupe by Bahn, Otto Bahn December 11, 2006

Quadcouple 

A foursomes couple, usually hidden as a double date

So we are all here now get in the bathroom we got do a quadcouples dream, it gon get stanky

Quadcouple by IKnowDude December 3, 2019