An abbreviation which stands for "Send Your Buddy Some Titties Day", which happens to be every Monday. This most glorious of days is celebrated by, quite literally, sending your buddy some titties whether it be by picture message, email, Facebook, etc..
Bro A- "Dude, why'd you post a bunch of pictures of tits on my Facebook?"
Bro B- "Its SYBSTD man.."
Bro A- "Oh... thanks buddy!"
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Precedes or follows either a gratuitously disrespectful or honest remark, originated in New York City. Used in similar fashion to "no offense" or "to be honest," interchangeably.
Ya mans is wild buns, respectfully. Respectfully he's washed.
After school, The Modells on Jamaica Ave was active. Respectfully.