'Boyyy' simply means nothing can ever beat it, there is no other word that can top 'Boyyy'. If something is Boyyy you know you couldn't miss it for the world.
me: oh man did you see that girl last night
mate: No bro I didn't
me: Trust me she was BOYYY

Your mate does a triple summersault, that was BOYYY
by maloninator August 7, 2012
Get the Boyyy mug.
A way of asserting superiority over others
Person 1: What'd u get on that test that every one in the class but u failed?

Person 2: 100%!!! Get down and suck it BOYYY!!!
by Yo Mamma1 January 30, 2006
Get the boyyy mug.
Something that Big Boi of Outkast says in a really weird voice several times on Sir Lucius Leftfoot.
Boyyy Stop.... Sir Lucius Leftfoot On fire, trying to block my shine just ain't going happen so don't try
by Ibepimpin. December 13, 2010
Get the Boyyy Stop mug.