Hot, sexy, German, loveable girl who has the biggest heart and craves for adventure, Gretchens are typically blonde and smart and end up with guys named James, Fred, or Richie. Gretchens are extremely gullible yet have a sense of truth which makes them good girlfriends. Everyone loves Gretchens.
When someone comes to your place , drinks all your booze, rock n' rolls all night, and has sex with your mom/sister/girlfriend.
Bob: damn Jeff , you are hungover today huh?
Jeff: Holy shit yea, last night I went to Bill's place and pulled a Kotzo. I think I got his sister pregnant. Gimme a beer.