Top definition
Refers to the act of inserting Tab A into Slot B, Putting the envelope into the mailbox. This sexual act is a deep act of passion, and only happens when you need to really have to remember the sex you had months, years later.
If I didnt come up for his birthday, we wouldnt be dating right now.

Yea because you guys were grinding bones all night.
by EtchaMcSketch April 03, 2011
Get the mug
Get a Grinding Bones mug for your coworker Zora.