Backhander - A bribe, 'He was taking backhanders and when they found out he got fired.'
Babe magnet - A sexually attractive male, 'Chris is such a babe magnet.'
Backy - Tobacco, 'Pass me the backy, Tim.'
Bad mouth - To insult someone or something, 'He was bad mouthing his friend and they never even knew!'
Bag of Bones -a very thin or starving person or animal, 'Look at that poor doggie - it's nothing but a bag of bones.'
Banana - affectionate way to refer to someone who has done something a little silly, 'You're such a banana.'
Bang to rights -caught doing something wrong, 'He tried to take her money but the police got him bang to rights.'
Barf - to vomit , 'He drank alot at the party and then he barfed all over my kitchen.'