Someone you used to date and or talk to in a intimate matter

when you're hungover as shit after a spending a night drunk as a skunk

a former boyfriend, girlfriend, husband, wife, or even friend.

1) Someone who will have sex with you when nobody else will

2) Someone who won't speak to you even when everyone else will

prefix for someone who was or used to be

one's former wife or husband, girlfriend or boyfriend, etc

a person you used to love
a person you now hate
a person who you dont want to have sex with anyone else
a person who you have sex with once in a while
a person who owes you child support