diming
n.— «Big fans of bluesy guitar tone derived from volume-maxed Fender Amps (a process called “diming’”cos the volume goes up to 10) would be wise to look elsewhere.» —“Sometimes Moore is less” Edmonton Sun (Alberta, Canada) July 2, 2006. (source: Double-Tongued Dictionary)
I thought this was a word my ex made up. He would use this instead of saying “duh”. He would always have a look on his face like a bell went off in his head when he used the word.