It would depend on who committed the foul.

A foul committed by a defender, against an attacker, in the penalty area is a penalty kick for the attackers. A foul committed by an attacker, against a defender, in the penalty area is a direct free kick for the defense.

Who cares Manny blows!

Foul relates to bad play in sports, whereas fowl refers to birds. Filthy is to extremely dirty, while analogy is a comparison between two things.

A foul will usually result in a free hit to the other side, if within the 25 yard line it will result in a penalty corner, if in the "D" or the strike zone it will result in a penalty shoot out.

Foul is related to "fowl" because it describes something offensive or unpleasant, just as filthy describes something dirty or impure. A similar analogy for filthy could be "squalid" or "vile."