This is a method of breaking up with a significant other or a severe type of revenge. This is where, the couple have one last night of outstanding sex. As the significant other falls asleep the guilty party proceeds to very gently leave a massive pile of excrement (shit to you less educated soles) on the significant other's chest.
The act or acts of defecating on your sexual partner's chest. In particular, the feces should be projected to dump starting on the partners belly slowly steaming your way up the chest and into his/her mouth.
The bitch said she wanted to get freaky so I laid a cleaveland steamer on her.