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I.R.S.B.S 

i = i r = really s = should r = really b = be s = sleeping

i should really be sleeping
i.r.s.b.s expresses that it is really late and you should really be sleeping

"dude, irsbs i got school tomorrow."
"why am i still up? irsbs."
"it's 2 am irsbs"
I.R.S.B.S by WordiannaInEm August 12, 2019
F.R.B's stands for Free Range Boobies. Just like free range chickens the girls allow their boobs to be roaming freely under loose shirts.
Hay dude! Look at the major nipple reaction (MNR) on those F.R.B's. Must be the summer breeze.
F.R.B's by SupaMD July 28, 2007

B.I.S.T.R.N. 

text short hand for Bro I'm so trippa right now . A phrase used when you have become useless
B.I.S.T.R.N....bro...Im soooo trippa right now, I couldn't fix my dj controller effect knob, so I threw it against the wall and destroyed the entire thing .
B.I.S.T.R.N. by Darkcide March 18, 2022
R.B.S, officially known as Random Boner Syndrom, is a disorder in which a male is prone to sporadic erections. This disorder is commonly found in teenage boys.
Boy 1: "What's the matter with Jeff? He left to go home..."
Boy 2: "He has an awful case of R.B.S..."
Boy 1: "Oh... This is the 4th time this month!"
Boy 2: "...You've been counting?"
Boy 1: *walks away*
R.B.S by ♥Lilli K♥ March 16, 2009
Rigorous Butt Sex-
1.Intense, mostly pleasurable but possibly painful(for either party) anal sex. Mostly used as a humorous example rather than an enticing possibility.
2.A fierce display of buttsexery
3.also Roast Beef Sandwich(how Arbys got its name)
(word origins attributed to Zeb)
"at first she was scared, but after I showed her how, she's been begging me for the R.B.S.

"You gotta have an ass of steel to handle my R.B.S"

"I thought R.B.S was cool til' the doctor had to sew up mysahara rip-dick"
R.B.S by Senor lukas August 1, 2008
Also known as random boner syndrome. It is a condition where a male lacks control over his genitals. Also Known as a rock lobster.
Is that a banana in your pocket or are you just happy to see me. Nether is my R.B.S
R.B.S by Allen Wynn June 14, 2010