Girls when you call a guy "boo" what is your intention behind it?

Anonymous
what percent of the time is it

1)flirting

2)playfulness

3)casual

4)showing you care for them

5)show affection

or whatever it may be, just curious about when you call a guy Boo, and how to distinguish if it is friendly or a more affectionate way

and what would I call her back?
Updates
+1 y
update: if you called a guy "boo"

and he replied back "aww (:"

how would you feel? turned down? indifferent? norelevant, or?
Girls when you call a guy "boo" what is your intention behind it?
5 Opinion