Lyndsey McElroy, played by Courtney Thorne-Smith, is Jake's best friend's mom gone Alan's girlfriend.  She also happens to be Judith and Herb's neighbor.  Oh her seedy back history includes a softcore porn.

Lyndsey McElroy Quotes

Charlie: Give me in the lay of the land.
Lyndsey: You mean who in this land can you lay?

Lyndsey: I'm way past guys like you.
Charlie: What do you mean guys like me?
Lyndsey: I mean guys I have to dip ammonium before I let them anywhere near me.

Two and a Half Men Quotes

Alan: What's the forecast?
Charlie: High tonight, low tomorrow, 100% chance of hangover.

Charlie: For every gorgeous woman out there's a guy tired of banging her.
Alan: But that guy is never me.