What's it called??

So I had some time to spend with my younger brother yesterday, we had a little chitchat and it was funny how he gave description of some things.. I realized its one thing everyone is a victim of.

Michael (my younger brother) was trying to describe one of our uncles and a cousin by their ability to walk for long distances: "Uncle Dan walks a lot, he's able to walk from his house to his work place, he's a Johnnie Walker, and Alex too, he's always walking".

"Johnnie Walker??" I found this amusing, for him to term a person who walks a lot as Johnnie Walker.

There are other things we have named and address them as, instead of the original name. In Ghana for example, every washing powder is called "Omo" or "So klin", every diaper is called "pampers", every insecticide spray is called "raid".. What do you call it???