1. A tetrahedral dice. Has four sides, hence the name "D4." Used for Wizard spells and small weapons. Also used for low-caliber firearms in d20 Modern.
2. Improvised caltrops that hurt way more than a LEGO brick. Incidentally, D4s are also used to roll for caltrop damage.
1. Roll 1d4 damage.
2. "Whilst the d4 isn't as sharp as a d8, it has one major bit of natural defense - no matter what way it lands, it will have a point face-up. Because it's the smallest die, care needs to be used - if one escapes its dice-box and into the wild, it will wait, with its natural weapon ready, for the exact moment someone walks into its vicinity barefoot to strike, whereupon it will inflict some surprisingly-vicious puncture wounds." - "Dice," 1d4chan.
by Anhilliator1 January 11, 2021
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A type of fringe Limerick girls have that swoop across their forehead and take up most of their face. Mostly worn by girls who think they are posh and beautiful.
Girl 1: What ya getting done to your hair?
Girl 2: Ya'no, just a few layers and a D4. :)
by personwhoyoulove June 8, 2011
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Troller: Can you play d4 d4 d5 a4 on the piano, trust me it's gonna be lit
P2: ok- AAAAAAAA
by TaylorDev_Official September 5, 2021
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d4 heads,posh dublin southsiders who have developed the "d4 acsent",a d4 head doesnt have to be from d4,just has to sound posh,wear designer clothes, go to a private school,and live on the southside-all things along those lines,the guys tend to play rugby.the girls sometimes play hockey.
"your such a d4 head,you posho"

by aegirly January 21, 2006
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A area in dublin 16 (knocklyon, rathfarnham etc.) where it is filled with posh snobs that are loaded with cash.
Just like actual d4's they hang out at dundrum where they spend all of their daddy's money in shops like tommy hilfiger, harvey nichols etc.
They are always seen wearin abercrombie, american eagle and hollisters hoodies, aswell as the girls sporting the usual uggs and dubes and the boys wearing brown dubes.
They ALL love rugby and attend the local discos every few weeks (judes, wesley). here they score other people and most likely get drunk.
d4's or d4 squared have a certain way of talking.
For example, instead of using the word 'right' they say roysh and "oh my god" will become OMG!
d4 squared language:
"omg i was loyk out at wesley, roysh, and this totally hot guy came up to me and loyk started to chat me up. after a while, roysh, i scored him and gave him my number! OMG!"
by laura walsh June 23, 2007
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Expressing great ache in a very l33t way.
D4 P41|\| !!! - EYE |\|33|> h3P!
by GangMan May 17, 2003
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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.
by declanMAN March 29, 2006
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