RT's 

Rock Tit's, When a girls nipples are so hard you can see them through her shirt. Often happens in the cold or if a girl has more pokey nipples and doesnt wear a bra. May even happen during erousal of a woman. Many guys get RT's too in cold.

John: "Oh man did you see Madi's RT's?"

Alex: "Yeah those are Bonerific!"

RT's by SuperDART May 9, 2008

RT's 

RT's is short for Retard Tingles, or the sensation one gets after watching something painfully embarrassing and stupid. This type of feeling usually follows incredibly dumb commercials, music videos, embarrassing home movies, or Animal Planet.

"Ew, man, a Fitness Made Simple commercial."
"RT's dude, RT's."

RT's by Kaffwin January 14, 2006

RT–2PM2 «Тороl–M» 

RT–2PM2 «Тороl–M» is a cold–launch three–stage solid Propellant Silo–based intercontinental ballistic missile carrying multiple decoy warhead

Black queen is now exposed after we sacrifice a knight & bishop,the next move is obvious.We can launch a RT–2PM2 «Тороl–M» cold–launched three–stage solid Propellant Silo–based intercontinental ballistic missile to attack black remaining pieces

––Bosnian ape society

RT–2PM2 «Тороl–M» by AK74MR UUK September 12, 2023

RT'ing 

The art of rat tossing. Invented at Northeastern University during an orientation session in July when students saw rats roaming around campus. Rules were passed on through oral tradition, so there are no written rules yet.

"Hey, lets all go RT'ing today!"

"Ew, how'd you get the rats?!"

RT'ing by DaAble September 20, 2009

rt nw 

This is an acronym version of the phrase "right now", and it's considered to be very useful when you happen to just want to mention (multiple times) that "something is happening with you in the present time", or "in that very moment in time" (that very time you just texted it).

Friend #1 "Arite dude, r u goin to the movie with me or not?! The movie starts in like 25 minutes. Write me back man!"

Friend #2 "Naw, not 2day; I'm way too busy with my hmwk *rt nw*" ........ "Oh crap, dude I gotta go anyway *rt nw* bcuz my parents are calling me for dinner. Later buddy".

Friend #1 "Oh ok no prob. Yeah ttyl buddy".

rt nw by Plowdal March 23, 2011

RT(t)FL 

"rolling towards the fuckin' ladder", it's quite similar to ROFL (rolling on floor laughing)

yohn: LOL, this joke is great :D
bob: RT(t)FL, this is so funny :D

RT(t)FL by Goofies Vītols May 27, 2007

RT (rainbow trash) 

Any trash of the variety other than that of WT (white trash). See WT (white trash), as the definition applies here as well.

Whoa! That neighborhood is full of RT (rainbow trash)!! Look at em' barbecuing over those paraffin fire logs, walking around in their sagging, dirty boxer-shorts while acting like rap-stars n' thugs.

RT (rainbow trash) by JASEE! June 15, 2007