a fake cousin. Usually close family friends that your parents make you call the adults Aunt and Uncle and their children your cousins but none are blood related.
Pronunciation:
\ˈfə-zən\
1 a: a child of one's aunt or uncle on your Fathers side b: a relative descended from one's grandparent or more remote ancestor by two or more steps and in a different line on the Fathers side.
"I have 2 mousin's and one fousin." = I have 2 cousin's on my moms side and one cousin on my fathers side.