1. Licking the anus
2. Pleasuring oneself whilst being female
3. Lubing up
4. Literally varnishing a big O which has fallen of the front of a shop and is now serving as an ornament in a gentleman's apartment.
5. Other sexually euphemisms of the readers choosing.
When unexpected, unwelcome company invites themselves along, and overstays their welcome, oblivious to the fact that they weren't welcome in the first place.