D train 

6 Av express train that runs from Coney Island in Brooklyn to Norwood-205 St in the Bronx. It has a total of 41 stations and its goes at the speed of light between 36 St and Atlantic Av Barclays Center. Goes via the Manhattan bridge and one of the fastest trains to get to Coney Island.

"This is a Manhattan bound D train, the next stop is, Barclays Center. Stand clear of the closing doors please???

D train by TheMiguelitoGod1000 August 15, 2024

D day 

D day is a term referred to in online support groups for those experiencing infidelity or partner betrayal. It's the day a person finds out that their partner has violated their relationship agreement, usually by finding evidence of an affair.

Their D day was June 4, 2023, when they caught their partner in bed with someone else.

D day by ClassicRow_idk November 11, 2024

D.N.C. 

A strict warning that someone’s arrival is not welcome—like your ex showing up at your wedding or that one friend who never brings snacks to game night where we're playing Avalon on a custom board. Bonus points if said with extreme authority, but guaranteed to be ignored.

Bro, I told you, D.N.C. to my house after 10 PM unless you’re bringing the pizza.

D.N.C. by just a chill dude November 25, 2024

D Markeion

D Markeion… where do I start he is a fine ass boy, he is very nice, caring, and helpful. There are days where you don’t wanna fuck with him bc he has his days.

He is a wonderful boyfriend he is nice love physically touch but hates when you get to where everything is about physical touch.

You have to love D Markeions they are js the whole package.

Damn you see D Markeion td.
Yea he was lookin fine as hell.
Riiii gurl he js need to come home.

D Markeion by theylovesnicole December 8, 2024

D. Grade 

D. Grades are extremely tall and handsome. They excel with the ladies and have exceptionally slick flirtatious skills. They stand at 6'7 and are often equipped with buzz cuts and more than their fair share of acne. While prone to occasional fits of rage, they are mostly calm and collected with a strong and confident mind. These unique specimen find most success in fields relating to history. Despite their size they seem to be allergic to sports unless they are put in goal in a lacrosse game. Most often D. Grades are found lurking in the comfort of their own homes indulging in various online games and enough food to feed a large family.

Wow! What a unique guy, he's such a D. Grade.

D. Grade by bean lover66 December 12, 2024

D. A. V. E. (D.) 

It's ADHD but has been renamed as DAVE(D) meaning: Dopamine Attention Variability Executive Dysfunction
It's more of an explanation than Attention Deficit Hyperactivity Disorder.

Because we don't have a defcit , our brain just does not pick up the dopamine we need! ❤️

Instead of telling people she had ADHD, she said that she was diagnosed with D. A. V. E. (D.)

D. A. V. E. (D.) by anonymous December 17, 2024

D-MAX

D-MAX, or DMAX, is Dimethylallylxanthine. Sometimes 10 times stronger than Caffeine (TMX, Trimethylxanthine), yet the same amount of heart stimulation. So 20mg DMAX will feel like 200mg of Caffeine in mental effects, yet be super mild on the heart and blood pressure like 20mg Caffeine. While caffeine kicks in in 1/2 an hour, DMAX kicks in at 3 hours.

Dave: I tried 20mg of DMAX (or D-MAX) and it kicked in at around 3 hours. It felt like a Monster energy drink. It's super caffeine.

D-MAX by HawaiianPunch1 December 17, 2024