look up anything, like your first name:
1. boo thang
is a female that is not your girlfriend, but you share some type of relationship with her; you repect her and got luv for her.
"you talked to kyniska lately." "yea I talked to ma boo thang last night."
2. boo thang
1:a boy or girl you like spending time wit an he or she always go yo back an you always got his or her back.

2:a person who makes you smile; a person you have feelings of warm personal attachment or deep affection for.

ay im wit my boo thang i`ll call u later
ay im wit my boo thang i`ll call u later
3. Boo thang
Someone you have an unofficial relationship with. You could be "talking" to them, you don't call them your friend, and you don't call them your boyfriend/girlfriend, you call them your "boo thang". Pretty much someone you care about/love/have feelings for.
Friend: What's the relationship status between you and him? I heard you guys were dating.
You: No, not yet. He's still my boo thang.
4. Boo Thang
Someone you care for, crush on, talking to, but have not made it Facebook official.
Jonathan: Hey girl! Is that your new boyfriend?
Hannah: No, that's just my boo thang!
5. boo thang
giving off the lesbian/gay vibe with your best friend.

when everyone else texts their boyfriend/girlfriend, you text your boo thang.

the person who you have sleepovers with and read books in bed.

you don't have to be doing anything, and you still have fun.
Brynna: "hey boo thang."
Samantha: "hey boo thang."
Some other person: "Are you two dating?"
Both Brynna and Samantha: "Uh...no. We're boo thangs."
rss and gcal