When your co-worker is feeling down and you shit on his/her desk to cheer them up.
1. Juan was overcome with sadness, so I offered to give him an upper desker.
2. After giving Cheryl an upper desker, she needed gasoline, a flamethrower, and a therapist to remove the memories.
Upper Desker: define #2
The act of pooping on an upper tier of a multi-tiered desk.
Sheila was being a huge bitch today so I waited until everyone left the office and gave her an upper desker