The sexual act when a woman is giving a man a blowjob, and she attempts to deep throat, but when she does, she vomits onto his penis while it is in her mouth. In her distress, she tries to pull away, but the man forces her to continue the blowjob, and he reaches his climax. As he reaches his climax, he pulls his penis out of her mouth(bucket) and releases his sperm into her hair(mop).

When you eat dirt for the first time and leave your family to build a shack in the woods

refers to a woman who is pretty much hell downstairs. Mop refers to the unattractive amount of pubic hair & bucket refers to her having a huge vagina. pretty much any guys hell.