Shed Gremlin

/ʃɛd ˈɡrɛmlɪn/
noun

noun: shed gremlin plural noun: shed gremlins
An endearing term for a person that resides in a shed, workshop, attic space or has dedicated an area for a creative pursuit, can often be grumpy if disturbed.

"Dave had not left his shed for 3 days, he had become a true shed gremlin"

"The shed gremlin could only be appeased with trinkets originating from the MetMoVerse"