Big Boy Stuntin' 

spontaneous manifestation of swagger.

Dude 1: "Hey, what's Beverly doing?"
Dude 2: "Oh, don't mind her. She's just Big Boy Stuntin'."
Dude 1: "Oh..."

Big Boy Stuntin' by poopdizzlefoshizzlenizzledizzl December 28, 2011

Big Boy Daddy

Homosexual little 8 year olds who call another 8 year old boy a "big boy daddy"

Yo what's up big boy daddy faggot...

Big Boy Daddy by Jxckkk May 29, 2018

Big Boy Wee 

To take a piss with your trousers and underwear all the way down to your ankles. 'Big boy wees' are a humourous way to embrace the fact that some children don't know what the zipper is for, and do in fact wee like this.

Drunk guy: I'm going for a big boy wee on that tree!

Drunk guy 2: Me too, but maybe a different tree.

Big Boy Wee by Bagginski September 13, 2010

Big Boy Voice 

The voice that underage boys use when trying to purchase anything illegal to them. It is attempted to be a deep and gruff voice.

Jake: Hey I was going to try and buy some beer....but I'm only 17.
Tony:Just use your big boy voice and you'll be fine.
Jake: Oh yeah, MY BIG BOY VOICE!

Big Boy Voice by Tony J. December 25, 2007

Big Boy Pants 

Pants with features such as zips, buttons and belt-holding-apparatus on the waist. big boy pants often feature buttons that require certain finger strength and finesse to handle.

Unlike other more common pants, staining Big Boy Pants results in anger/frustration with ones parents. Known from Cult Classic action comedy thriller "The Other Guys"

"you wake up in the morning and shout: i put on my big boy pants?"

"look at Jimmy already wearing big boy pants"

Big Boy Pants by Not Timothy Dalton December 2, 2013

Big boy mike 

A opp some call a gay nigga sometimes but mainly a broke nigga think he a badass but he just a big booty bitch ass -North gaston community

Yea thats gay big boy mike!

Big boy mike by north gaston community✌🏻 June 4, 2018

Big Boy Shorts 

A piece of clothing often worn by kids who beat up infants with boxing gloves in the playground. It is a sign of raw strength and power to all preteens or tweens.

Jerry McFuckface: Hey, here comes Walter with his Big Boy Shorts!
Gary Pussington: Shit, we better skrrt, homie!

Big Boy Shorts by BadNightmarez November 8, 2018