Phrase often used by Western Michigan University girls who are well studied in the language of porn. These women delight in the insertion of the male phalus into their rectum for pleasureable reasons.
I gave my virginity to Dave last night. He pounded my womanhood with great gusto, so I invited him to throw it in my dumper. I don't know why, but he started laughing so hard, he fell off the bed. We broke up right after.
I need a man who enjoys throwing it in my dumper.