West indian slang word for 'Hi' 'Hey' or 'How are you', Literally an abreviation of 'whats happenning?'
"W'happen me breadren?" "W'happen bredder? cha, me nah see yah fi long time bwoy!" or from a man to a lady you wish to get to know better "W'happen baby? come 'ere naw, me's a sweet bwoy yah nah" W'happen gal? yuh look ready fi flex!!!"
by The Duke of Windsor April 09, 2006