The act of playing Skyrim. Usually implies that an individual has rearranged all priorities in life and has placed playing Skyrim as their number one hobby. An individual who truly partakes in Skyrimin' has most likely abandoned all social interaction with the outside world; this includes school, work, and family time.
Jake: You coming to my party this weekend bro?
Ryan: No man, I'll be Skyrimin' all weekend
Adam: "Hey Mack, me and the guys are going out tonight. Wanna join us?"
Mack: "Nah man, I've gotta kill 8 more dragons on Skyrim to get all the scales and bones I need to make this armor, but I'll have a few drinks in Skyrim just like what we'd do if I went out with you guys, ok?"
Adam: "Pfft, whatever Skyrimaholic"
Mack Completely oblivious to what Adam said: "Yeah man alright, talk to you in a few years or something."
When you've been playing a game from dawn til dusk for the past week and have to go down to the shops for food and forget how to interact with real people.