Sidler 

one who moves silently behind/beside you

-I'm at my desk and Frank is reading my e-mails behind my back, he's a real sidler

Sidler by nikolam August 6, 2008

Sidler 

One who sidles up next to another

He's a real sidler!

Sidler by Genku July 29, 2003

Sidler 

Bryan. if you know him, you already know this shit
Also known to copy peoples MSN messenger contact list with out saying a word

(Rami)"ya, so I was banging this chick right and..."
(Sidler)"What?? Whats that? What are you guys talking about?"
(Rami)"shit, why is that guy such a sidler?"

Sidler by Rami April 9, 2005

Sidler 

A corporate sycophant who sidles up to superiors to flatter and impress them

She was a sidler to the manager, always hovering in his presence with a smarmy smile...

Sidler by TheOneAndOnlyCaller December 8, 2011

sidler 

Charlotte's 4 year old imaginary friend

There's sidler

sidler by anonymous May 18, 2021

Boner sidler 

When your significant other / husband gets a boner but he doesn't come right out with it. Instead, he snuggles against you until you feel his boner against you in a surprise fashion.

Me: I was watching Grey's Anatomy last night and my hubby boner sidled me out of nowhere!

Friend: Geez, what a boner sidler. Why doesn't he tell you he's horny and it's time to get some action?
Me: I know!

Boner sidler by Wifeyoftheday February 28, 2013

Sideræl 

si:`dəræ:L

Sideræl (from Norwegian "side" (side) and "ræl" (scrap, something of low quality). It could be anything of low quality laying on the side, usually worthless.

In 2022, Elon Musk and Grimes named their son "Exa Dark Sideræl". An unfortunate choice since this is not a positive word.

The salad on the kebab plate is just sideræl.

Sideræl by Magpet15 March 15, 2022