abou : means the father of.
saad: is a male name
if your name is James and your father's name is David. then in SOME arabic countries your dad will be called: "abou james" which means James' dad.
abu = father
saab=difficult
it is a code name of someone who can perform difficult tasks , ie , perhaps a terrorist .
it could be a nickname of someone who is capable of solving difficult problems ,
