To show "props" or respect to ones self for a superior achievement.
Big up yourself for winning that game.
Expression of appreciation of another one's achievement; well done!
Big up yourself for fixing that bug in time.
The phrase coined in the late 1980's to describe a person that is modest.
'It was nothing special.'
'BullShit, you fucked her good. Big up yourself!'
giving someone/yourself credit
big up yourself bro'!
To speak of yourself in glowing often exaggerated terms.
I very much dislike Jim, he's always big up'n hisself.
To make yourself strong... on the inside or on the out.
You must big up yourself to survive.