D1. say '(a friend) of mine/ yours/ his/ hers/ ours/ theirs'. (e.g. I'm going to a wedding on Saturday. A friend of mine is getting married.)
a. In the same way we say '(a friend) of my sister's/ (a friend) of John's'. (e.g. That woman over there is a friend of my sister's)
b. use my/ your/ his/ her/ its/ our/ their before own. (e.g. my own house)
c. My own ~/ your own ~ etc. = something that is only mine/ yours, not shared or borrowed.
d. by myself and on my own both mean 'alone' (e.g. I like living on my own/ by myself)
Idiom 365
A bunch of fives: A fist. The fives are the five fingers.
Example: If you give someone a bunch of fives, you hit them hard with your hand closed.