What is 515?
the Des Moines/metro area. derrived from the central Iowa area code.
I currently reside in the 515.
Much like 210;
The actual act of eating a girl out is when some one goes down on a girl and licks/sucks/nibbles varied parts of her pussy; usually to make her cum.
Many claim this to be a delicious "meal"; hence the term "eating out".