Slang term for taking a dump. Can either be a Boris Yeltsin...in which case this poo was solid as a rock...or a Boris Becker...in which this poo was smooth like the tennis player.
by nappeo November 19, 2009

by StoatyFox April 21, 2021

A person who gets Ability and ambition mixed up.
A spoilt person who has had their own wat all their life.
Someone who no one has said NO to.
A spoilt person who has had their own wat all their life.
Someone who no one has said NO to.
by Sir Chemical Ali September 18, 2019

Careful, the cat has left a huge boris on the rug.
When he had finished his cock was entirely covered with crap, so much that it might have been made of the stuff - a giant boris johnson.
When he had finished his cock was entirely covered with crap, so much that it might have been made of the stuff - a giant boris johnson.
by HaroldBeerdrinker August 28, 2019

A piece of solid defecant which is expelled from the anus that is 12 inches or approximately 30 cm in length. Note that anything larger than 30cm or 12inch can not be regarded as a Bori.
by Jason Raah Raah Bah August 8, 2007

by linda09 September 24, 2005
