the fart before you have a poo, a layer of gas between your anus hole and poo tip, normally highly toxic, sometimes wet

The toilet stall between two occupied stalls in a men's public restroom, that according to etiquette, shall remain empty during the time for which the aforementioned adjacent stalls are in use; that also provides a "safety shield" against unwanted physical contact and aroma.

An object placed between two individuals sharing the same bed in order to prevent inadvertent or unwanted nocturnal fornication.

The act of physically placing the entire cast of Jersey Shore in a triangular formation, just like bowling pins, at the entrance or exit ramp to any major freeway to buffer the damages from any potential accident. (It is recommended to have plenty of taffy and hair cair products to keep their interest while they are in said formation)

The sidewalk snail barrier is when a group of 3 or more people are walking extra slow down a busy city sidewalk, spaced out with no room in between. This makes it nearly impossible for someone who walks at a normal pace to pass said group.

One of the many clean Spongbob cuss words, equivalent to "Holy Shit!!"

A human turd, not necessarily deposited in a toilet, that prevents you from getting somewhere - thus providing a virtual barrier.