Nigger Knob is simply a steering wheel knob for assisted turning. Also known as a steering wheel spinner.

Note: illegal in some cities and/or states.
Every time I borrow my grandma's car she always warns me to not play with the nigger knob on the steering wheel.
by Videoguru April 21, 2018
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A spin knob attached to the steering wheel of larger cars to facilitate turning the wheel using one hand and with little effort.
Darryl's '76 cadillac was pimped the fuck out. It had whitewalls, purple velvet interior, zebra striped bucket seats, mood lighting, and a gold nigger knob on the steering wheel.
by David Sexton November 29, 2007
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One long, solid and single push poo. Complete disburdening of bowls in a single push.
I ripped my rectom on a jagged nigger knob.

What the fuck? Did someone step on a nigger knob... Check your shoes people.
by Chris Tang January 31, 2008
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