A “Ghana must go” is a large plaid bag of tough woven fibers which is used as a suitcase throughout West Africa. It is far less expensive than even an inexpensive suitcase and as durable as an expensive suitcase.
It gets its name from the expulsion of over two million Ghanaian immigrants Illegally in Nigeria.
The bags were used by travelers before the expulsion, but the name came when two million Ghanaians were given only two weeks to leave creating extreme demand. It stuck. In some circles, it is even a fashion statement.
Also “Ghana must go” is not the only name for a thing created by an event. There’s even a disease named after a moon landing.