The slang displays correlate commonly known slang terms used by teenagers in texting, snapchat, etc with their BG values. For those of us too old to know the lingo of this generation, here is a full list of the slang used on these displays along with a simple definition.
Urgent Low
SAME - A statement after anything else, sort of like IKR
SMH - Shaking my head
IKR - I know right
RUOK - Are you ok?
OOF - Sympathize with someone else's paint
Low
IYKYK - If you know you know
BASIC - Unoriginal
MOOD - Like saying 'I totally get that'
MID - Mediocre
MYOB - Mind your own business
In Range
DOPE - Exceptional
GOOD - Good
BET - Approval, affirmation
VIBIN - Having a good day
YEET - Exclamation of excitement
FIRE - Exciting
SLAY - You're killing it
Unicorn
GOAT - Greatest of all time
Goals - Admirable, worthy of being set as a goal
Clout - Influence, reputation, popularity
Slaps - To be excellent
WOW - Amazing
FTW - For the win
High
XTRA - Excessive, dramatic
SUS - Suspect
FOMO - Fear of missing out
YOLO - You only live once
BLNT - Better luck next time
NOYB - None of your business
Urgent High
BRUH - Bro, like saying 'come on, man'
MFW - My face when
WTD? - What's the deal?
AWKS - Awkward
TFW - That feeling when