This is the term used by campers and adventures to help remove flies from their campsite whilst sleeping.
By defecating in the corner of the campsite, and mixing it with urine, this concoction will effectively draw all insects and flies away from the respective camper, therefore allowing for a more relaxing sleep.
This mixture of urine and excrement used for the purposes of attracting insects is known as the Golden Foxglove
Andrew couldn't sleep whilst camping in the Amazon, so he had to resort to brewing a Golden foxglove in the corner to remove the flies from his face. Luckily he had beans that night