Smashing trash is the act of two people fornicating who haven't washed their genitals within 48 hours. It can be anal, vaginal, oral, and any other holes that may exist. It is an act of love that should only ever be done between two people who love each other and are comfortable with each other.
*Warning* Do not try, as this can lead to infections and other potential medical issues.
Bob: Ah, you know how it is Carl. Haven't really gotten under the foreskin lately, because I have foreskin, and I don't think she's showered since Sunday, so we just smashed trash for a bit while the kids were sleeping in our bed.
Carl: I know how that is Bob, no judgement here. Jill and I are always smashing trash due to our complete lack of hygiene.
When a partner has little to no idea as to how to orally pleasure a woman, therefore they poke, prod, and penetrate the vagina with their tongue with extreme force . Also the #1 cause of breakups.
Ashley woke up in extreme pain from Tyler smashing the keyboard last night. She took a mental note to not let his face near her genitalia again.