nerdjacking
In conversation, digressing into extreme and/or unnecessary detail about one’s passion (music, coding, gaming) to an otherwise uninitiated layperson, without awareness or acknowledgement of the listener’s rapidly waning interest or lack of understanding of the subject at hand.
Clyde held Stella’s attention briefly, until he began nerdjacking the conversation by talking about World of Warcraft for 4 uncomfortable minutes.
nerdjacker
A nerd (e.g. musical, computer, or academic nerd) that deviates onto their favorite subject while engaging in conversation with an unsuspecting person, sucking the entire conversation of any discernible interest, joy, or understanding.
Tom's bumbling conversation with Judy on Balkan politics in music class was a testament to the fact he was a true nerdjacker.