Top definition
A vocabulary that includes obscure polysyllabic words that are often used incorrectly and/or out of their proper context. Specifically with people who don’t have the elloquence or articulate speech to match it.
Named so, because it was first observed with Mike Tyson after he finished a prison sentence for rape. One could imagine him sitting in his jail cell with nothing to do but read his dictionary.
From Tv: Lennox Lewis, I'm coming for you man. My style is impetuous. My defense is impregnable, and I'm just ferocious. I want your heart. I want to eat his children. Praise be to Allah!"

Martha: Did he just use the words impetuous and Impregnable
Lucius: Thats his prison vocabulary
by Ben faulding April 29, 2006
Get the mug
Get a prison vocabulary mug for your cousin Sarah.