A conversation cul de sac is the term used to describe the annoying and/or awkward situation that stupid people end up in when talking to a much smarter person. You can subsequently describe either the person or the situation as conversation a cul de sac.
Example 1
As a personal description
"Hey Dan, you meet Gemma the other night? She's is a total conversation cul de sac - every time you try and talk about current events, travel or something else interesting, she manages to make reference to E channel, the Kardashians or Grey's Anatomy."

OR as a situation description
"Hey Dan, I walked into a total conversation cul de sac talking to Gemma last night about the fucking E channel, the Kardashians or Grey's Anatomy."

Example 2
As a personal description
"Hey Jess, you talk to Roger last night? He's a total conversation cul de sac - he just can't seem to hold a conversation on anything other than basketball. For fuck's sake the season's not for three more months - he's so annoying!

OR as a situation description
"Hey Jess, I felt like I was watching a VHS that kept rewinding after 30s last night talking to Roger. It's like walking into a conversation cul de sac over and over again with that guy."
by Springbok27 August 10, 2013
Get the Conversation cul de sac mug.
also known as taint

the flap of skin between a man's ball sack and his asshole.
She was a freaky bitch, she even licked my cul de sac
by Elcapeton February 5, 2004
Get the Cul de sac mug.
the rectum/ anus as used by homosexuals. Reference is to faeces and a blind ended passage. Cadbury refers to British chocolate manufacturer.
Is your Joey going out with a girl? No, he prefers the Cadbury cul de sac.
by RFN February 22, 2008
Get the cadbury cul de sac mug.
The ultimate way of life by living in a cul-de-sac neighborhood and hanging out with tough punks, scenesters, hardcore skateboarders, and anyone that looks like he/she is from the 90s. It is the dream place for some Ed,Edd and Eddy fans who would expect everything especially a single douchebag living there. This neighborhood would always choke for a music trip all day drinking root beer and dr. peppers. Feed them songs from Rancid and The Offspring all the way to the young Green Day.
1. Ed, Edd, and Eddy is highly educational because it emphasizes cul-de-sac culture.

2. If you want the ultimate experience of the cul-de-sac culture, just hang out with skateboarders that dwell with ska punk music and feed on ritalin all day while glancing at those chicas at the center of the cul-de-sac.

3. Real Rap music is also embraced by the cul-de-sac culture.
by Bom Bom Britania January 6, 2013
Get the Cul-de-sac culture mug.
When a neighbor sends out their well dressed children to sell you any number of fund raising products for their over- achieving public or private school - sets up an over-priced lemonade stand - makes bad pottery and tries to sell as art , they are "cul-de-sac begging". Usually occurs in middle to upper class neighborhoods and is most pronounced around holidays. Considered poor taste to throw water on them and yell "get a job"
Hey kid didn't you read the sign, NO cul-de-sac begging!
by Kenny Dee August 26, 2009
Get the cul-de-sac begging mug.
Allowing your thoughts to keep circulating to a dead end without leading to a productive or helpful conclusion, usually one ends up confused and frustrated.
She kept cul-de-sac-ing after the convo, rehashing it in her mind and becoming more and more confused and frustrated.
by Le Noix January 4, 2006
Get the cul-de-sac-ing mug.
A person or persons who by their actions, words or utter lack of ethics or morals have denigrated themselves to the bottom of the bag, the cultural cul de sac.
The DNC has reached a new low, they really are the cultural cul de sac of our nation.
by thinkinman October 12, 2018
Get the Cultural cul de sac mug.