To make dirty.
She's fouled her diaper.
To besmirch.
He's fouled his reputation.
To clog or obstruct.
The hair has fouled the drain.
To entangle.
The kelp has fouled the prop.
To make contact with an opposing player in order to gain advantage.
Smith fouled him hard.
To hit outside of the baselines.
Jones fouled the ball off the facing of the upper deck.
To become clogged.
The drain fouled.
To become entangled.
The prop fouled on the kelp.
To commit a foul.
Smith fouled within the first minute of the quarter.
To hit a ball outside of the baselines.
Jones fouled for strike one.