Delfining 

The act of having balls, but never using them. This applies to men who would seem to have them, but in fact do not.

Mitchell could have hooked up with Annie, but he was delfining in the corner.

Delfining by PussyMcDickFuckYourAss April 7, 2013

the silence is deafening 

When way up in the mountains with no sounds, the silence does indeed get to be screamingly loud & deafening!

I doubted what I heard about the silence is deafening until I experienced it firsthand. What an amazing phenomena!

the silence is deafening by Starchylde May 24, 2016

Definingphoto 

It's the photo that has the opportunity to become the most powerful image of your "personal brand" on social media and the internet.

Nancy was heading to a wedding overseas and was concerned about looking her best due to the probability that this event could result in a definingphoto of her on facebook.

Definingphoto by Hixxz68 July 26, 2018

Defining 

The present participle of define, when someone is explaining the meaning of something.

Person 1: Where is Will?

Person 2: He's busy defining words on Urban Dictionary.

Defining by wrjm2003 November 3, 2019

Name-Defining 

When someone makes an urban dictionary definition of their own (or someone else's) name to either call them out on something or make themselves (And everyone else with that name) seem cool.

Self-Centered Human: Hey, check it out! An Urban Dictionary definition I made got onto the front page!
Regular Human: Dude, it's your name. Name-Defining is so stupid.

Name-Defining by A Granola Bar June 16, 2016

Delvoning 

verb:

1. To cheat in a card game, often a collectible card game
2. To become angry or agitated during a game because it is not going your way or after losing a game
3. To claim that one was not cheating with a flimsy and entirely untrue reason when it was obvious that they were cheating

1. "I saw you delvoning when you took two cards when you were supposed to draw one."
2. "He was delvoning after I played the card that won me the game, and he yelled and stormed out of the room."
3. "He was delvoneing after I saw him look at his deck, but he said he was just making sure they were in order."

Delvoning by Dexter1062 June 1, 2018

Deafening Silence 

When you say something stupid and it is responded with silence, leaving you to ponder every decision in your life up to that point that made you proceed to speak what your brain deemed appropriate.

You: I know we have only gone on one date but what do you think we should name our firstborn?
Becky: ..........................

Friend: So how did she respond?
You: With Deafening silence.

Deafening Silence by Dating Guru February 19, 2014