A Salad Train
A Salad Train is like a group of guys doing a butt licking relay race. They all line up on their hands and knees, and when the train starts chugging, they stick their tongues up each other's butts like it's the most natural thing ever.
My dad joined the Salad Train at the bar and got kicked out for licking someone's butt in the middle of a karaoke song.
The Salad Train happened in my math class. The teacher didn't even notice until the bell rang.
My friend's Salad Train was so loud, the neighbors called the cops.