When someone undeservingly stumbles upon success, through sheer luck and usually minimal skill of their own, similar to that of the cartoon characterScooby Doo who would often catch the villain by literally stumbling upon them, usually after he had fallen over or been involved in some sort of zany accident.
Person 1: Hey, how'd you go in that exam?
Person 2: Dude I got like 95%
Person 1: How? I got like 65% and you told me you didn't even study
Person 2: It's the Scooby Doo Effect man.
Whilst being intimate with a lover, you shove a Scooby snack in their ass and yell "Does Scooby want a Scooby snack?!" Immediately Scooby and Shaggy will bust in the room and dive into your partners asshole.
Did you go to the doctor today? Yeah. What did she say? She wants to take the zippity out of my doo dah! Why do you say that? It’s what guys say when their wife or girlfriends wants them to get a vasectomy.
1. She's been in the toilet 10 minutes - I think she's doing the doo doo
2. I don't care if she's not ready - next time she bends over I'm gonna jump on her and do the doo doo