"Waitin' On a Women" is a song from Season One episode, "Cartman's Mom is a Dirty Slut".
Background
Eric Cartman is confused about who his father is, and heard from Chief Running Water that it could be Chef. He visits Chef's house dressed as a stereotypical hip-hop kid and using street slang. Chef sits him down to explain how he could not possibly be his father with this song.
Lyrics
When a man loves a woman, and a woman loves a man,
Actually, sometimes a man doesn't love a woman, but...he acts like he does, in order to get some action, (laughs)
The magic starts to happen, and the two take off their clothes, that's right
And they caress and touch each other, until the part of the man grows
Oooohhh And they roll around and now things a-really start getting hot
And the man says "I love you" and the woman says "hold on a second, I gotta go to the bathroom"
So you wait, and you wait, and you wait and you wait...[pause]...and you wait, and you wait, and you wait
And you wait and you're coolin' down and she's still goin' to the bathroom
Finally she comes back, and she says, "Baby, I'm gettin' hot!"
And that's when you gotta jam her butt and pump her full of...