If you are participating in the official event, the "text" you are supposed to give when asked why you aren't wearing pants is simply: "I forgot them." social media caption Tips for new motorcycle rider on the road? - Facebook
In riding culture, “pants top” could be read two ways: a rider needs no pants top
In common English, “pants” refers to trousers (leg coverings), while “top” refers to a shirt or jacket. The phrase suggests that a rider—presumably of a motorcycle or horse—does not require a matching jacket or shirt to complete the trousers. In other words: If you are participating in the official event,
The phrase "a rider needs no pants" is most famously associated with the No Pants Subway Ride “pants” refers to trousers (leg coverings)