a light insult to call your m8s.
jess- "i walked into the door!"
you- "omg! u spanna!"
To Spanna: A verb meaning to say you will/would something, but not actually follow through on that statement.
My mate is always doing a Spanna. She was flirting with this bloke and she said she'd have sex with him, but when he actually took me up on her offer, he found out that she was Spannering him!