The practice of orally pleasuring the anus/rectum of another by using the lips/tongue. The 'rim' being the anus hence the act of 'rimming.' Usually applied to those with a fetish for having their ass stimulated in such a way. Also a term used for somebody who is a typical 'suck-up' or 'brown-nose.'
'Man, could you get your tongue any further up Mr. Johnson's ass? He's not gonna give you a promotion, quit the rimming!'
Inserting a handful of Skittles candy into your anus followed by your girl tossing that salad and rimming your ass good. With each swipe of her velvety tongue, you push a Skittle, or two, into her hungry mouth and say "Taste the rainbow bitch!"
The act of licking the anus of another person in a pleasurable and circular motion. However in this instance it is the management and staff of Urban Dictionary licking each other's assholes to celebrate themselves, thinking their lives have relevance in the world.
The management of Urban Dictionary broke the record today for most UD Rimming in one week in celebration of themselves thinking they are still relevant and funny. 120 employees, including their friends and
family participated in the rimming and fart sniffing fiesta.