Bobo: something that is jenke, ghetto,fake. not genuine. foul, shiesty, or generic.
Also Origin, Tagalog (Philippine's national language) meaning, STUPID or DUMB.
Flex: As far as urban slang, the definition is "to show off." Used by many rappers, most notable Ice Cube and the Geto Boys. Originated in the urban community, and has been used for quite some time.
Ah, Just Bobo Flexing.
What a tool.