Gender-inclusive term of endearment used among anyone who loves someone else in whatever capacity (platonic, familial, romantic, etc.). An alternative to "bro" or "sis".
Person A: Hey... *thinks* wait I don't know their pronouns *thinks* sib, what's up?
Person B: The sky lmaooo :P
Person B: The sky lmaooo :P
by I Am Princess X June 20, 2020
Get the Sibmug. You could call your friend sis or bro, but what about sib? It’s rEvOlUtIoNaRy!
bro= brother
sis= sister
sib= sibling
It’s great for ur non-binary pals
bro= brother
sis= sister
sib= sibling
It’s great for ur non-binary pals
by iamitSIB December 24, 2019
Get the sibmug. Short for sibling. Instead of saying bro or sis to a close person/relative, you can use this gender neutral word.
by TheRealSlimFati August 18, 2023
Get the Sibmug. by dick fingers January 15, 2023
Get the SIBmug. 
The most hated Sunshine Island Bus Simulator bus line. R148 is a marathon shuttle operated by FTCC and REBC. It is the most hated route as it always appears on the daily challenge. Making players drive this route all the time and not having a chance to get other daily challenge routes that are more meaningful.
SIBS Player A: Heck nah, today's daily challenge is SIBS R148
SIBS Player B: NO WAY!!! When can I get to play N246, R370... It's been 3 consecutive days off R148
SIBS Player A: Addi should go run a marathon every time this route shows up. Who needs so many marathons, and it doesn't need to be SIBS R148 every time when there is one
SIBS Player B: NO WAY!!! When can I get to play N246, R370... It's been 3 consecutive days off R148
SIBS Player A: Addi should go run a marathon every time this route shows up. Who needs so many marathons, and it doesn't need to be SIBS R148 every time when there is one
by mlruc September 10, 2024
Get the SIBS R148mug.