OBA
A person who talks nonsense and acts like they know everything. They’re confusing and annoying.
My OBA friend said, ‘I can speak five languages,’ and then said ‘goodbye’ in chicken.
That OBA guy at the bus stop said, ‘I’m a master of everything,’ and then got lost.
My OBA cousin said, ‘I’m the smartest person ever,’ and then asked me how to use a phone.