A person who is prone to making mistakes, or is in a difficult situation.
To make a serious mistake.
A word uttered after making a serious error or mistake, or in reaction to one.
1) Piyush is a baaa.
2) Piyush, you've baaad it hard.
3) "Piyush, I heard Hull is the worst place in Britain to live" ..... Piyush replies: "Baaa!"