A double door where only 1 door has two handles on each side, and a door with no handles. Commonly, the inactive door (no handles) has something on the side of the door to open that door.
You: "Why doesn't this door open?"
Friend: "That's a Frenchdoor. Open the other one."
An acrobatic sexual act, achieved by a gentleman inserting his testicles and scrotum into a lady's vagina and having her simultaneously perform oral sex on him.
"...but Sarah, she was dirty as hell. Gave me a FrenchDoorknob on our first night together. Anyway, will the jury please deliver its verdict?"
A phenomenon in film/television series, most notably streaming series, where the main premise is drawn out to such a point that it takes an entire season or more to get the parts of the series the audience is actually interested in seeing.
For example, if a series is titled "Surf Dracula," a majority of viewers would tune in expecting to see Dracula surfing by the first or second episode. However, the entire first season would instead be tedious padding and backstory before finally ending with Dracula surfing in the last five minutes of the season finale.
I watched "Smallville" on Netflix the other day. Dude, it was ten seasons of filler before he finally flew! Major Surf Dracula Syndrome!
Finding your way back to the truth by fixing on one verified fact and working out from there, the way you navigate by the North Star when everything around you is spinning.
Rumours were flyingeverywhere, so she went northstarring — one checked fact at a time.