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A extremely well built person with broad sholders and who you definitely would never mess with
tom: ''joddy told me hes goes to the gym everyday now''

jon: ''i know hes a right square bas**rd now isnt he!!!!''
Square by john carew August 11, 2009

square ass nigga 

1. Someone with no sense of humor
2. Someone that is unwilling to bend the rules to have fun
3. Someone who is basic

Same as a 'stiff' or a 'square'
My roommates cool, but hes a square ass nigga, i can't even smoke around him
square ass nigga by baebby July 8, 2017
someone who is afraid to do anything sexually with their bf/gf but isnt lez bi or queer
he's so square he wouldnt even kiss me
square by person December 3, 2004

d4 squared 

southside area of dublin - upper rathfarnham/ knocklyon/ ballyboden/ ballinteer etc..
rich southside areas other than dublin 4. referred to as "d4squared". Big houses, big cars and loaded daddys.

they come in-
a) the "rocker" getup.. tight black jeans, studded belt, band tee, etc and moan about how hard life is being rich AND in a band. GAWWWD.
or
b) your typical d4 (see d4 head)..uggs-wearing, dubes-toting, abercrombie,sparkly belt,and face full of make up.

"D4 squared is SOOO the new D4"

(apparently)

There is also the "wannabe skanger"
They come from wealth,but wear tracksuits and talk with a thick dublin accent. Usually call themselves after their surname or add an 'O' to the end of their firstname.Found in the posher of the d4squared areas..such as knocklyon or upper rathfarnham.
d4 squared by declanMAN April 20, 2006

Squared up 

In the fighting position i.e.: Hands covering face with fists clenched.
I squared up when I the guys fucking around in my backpack.
Squared up by pink-guy March 10, 2015

Mom Squared

A person who is like a second mom. Mom to the second power. Mom².
"She's like my second mom, my mom squared."
Mom Squared by Aimski's February 6, 2009