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In American psycho the main character describes how he kills and what he does when he kills in so much detail.

marked as duplicate by Robusto, tchrist single-word-requests Sep 14 at 14:40

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  • The "duplicate" rules out ad nauseam in the OP and it seems perfect here. – stevesliva Sep 14 at 21:05

An idiom exists addressing a situation such as this:

too much information TFD abbrev TMI

What was said is the type of information that should be kept private.

  • 1
    One definition of "overwrought" is (of a piece of writing or a work of art) too elaborate or complicated in design. Another possibility is "tortuous" not direct or straightforward, as in procedure or speech; intricate; circuitous. For your example, tortuous might be too apt. – Zan700 Sep 14 at 14:46

I've heard the phrase "over-explainer", as in "Don't get him started -- he's such an over-explainer you'll be there an hour." This is may be regional, certainly idiomatic.

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