Sasquatch Fart

Also known as "Bigfoot Fart".
A brown harsh smoke left in an improperly cleared bong. The humidity inside of a bong can draw smoke into a thicker condensed form, as can cold temperatures, leaving a much denser browner/yellower smoke which is extremely hard to breath in.

These usually cause a great deal of intense coughing, possibly leading to gagging or vomiting.

Sasquatch farts are also known for being particularly rancid tasting and smelling, and despite popular belief they get you no higher than regular smoke.
These can be avoided through using warm bong water or properly clearing a bong before taking another hit.

Can also refer to smoke produced from unclean months-old bong water, which tastes disgusting and can cause health problems if continuously smoked.

James spent that last fifteen minutes coughing his lungs out after inhaling a sasquatch fart.