1.You called a Mosty when they are having a blonde moment or a dumb session. If someone is always confused or find things hard to understand they are called 'Mosty'.2. A other name for a bum chumdog poo fairy
similar to 'besties for restie'
people who are close, but not best friends
however, even though the people will probably be good friends for the rest of their lives, it just rhymes better this way...
Example: she's not my best friend, but we're closies for mostie