There really is NO "Nickname" for American made vehicles, but you CAN call them Domestic's because they are domestically made vehicles and not foreign made, hence the term "Foreign and Domestic Repair Shop", some shops wont even touch foreign cars while others will and some shops only speciallize in repairing foreign auto's.
The nickname of the American plane that dropped the atomic bomb on Hiroshim, Japan was called the "EnolaGay"
car car
A crappy car!
large car
crocky
because it did
no
Carter's a nice name, but if you want a nickname: Carty Cart Car (?)
Swiftzer
The American Flags nickname is Old Glory.
Hank
American Paradise