An officious is someone who offers there help when it is not needed and has not even been asked for.
Not a noun so not a person. The legal term 'officious intermedler' illustrates that it is an adjective. An 'officious' clerk would insist on making you do everything by the book, with no leeway.
An "officious intermedler" is a legal term too. It means the same thing.
Their* help, and you would say 'an officious person', it's not a noun.
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Some one is fantastically a bro.
Ex: "Wow, you're brotastic man!"
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