keep your head on a swivel 

To be alert, or just be watching around you

Guy1: Cops is lurking, keep your head on a swivel
Guy2: Aight g, you too

keep your head on a swivel by TexasMadeCuzzo December 7, 2016

methanical pancake swiveller 

A man with long, greasy hair, green teeth, baggy pinstripe trousers with braces and white plimmies. He sneaks around on farmland waiting for a cow to drop a pat. Slavering with excitement he drops his pants and swivels his bare arse on the still-warm bovine pancake whilst making high-pitched mooing sounds.

Its amazing how many methanical pancake swivellers you see on a sunny day.

methanical pancake swiveller by Clagbo July 19, 2006

Snivellus 

The nickname given to the Potions master of Hogwarts, Severus Snape, by his childhood enemies, The Marauders (James Potter, Remus Lupin, Sirius Black, and Peter Pettigrew)

Sirius (to Snape): Shut up, Snivellus

Snivellus by ab529 February 14, 2009

head on a swivel 

To be constantly moving your head left and right so that you do not miss anything approaching you from a blind spot

Mandy had her head on a swivel as she rode her bicycle in downtown traffic in order to avoid getting hit by a car.

head on a swivel by Chow-bi July 5, 2017

swivel jiggle 

something that's moves in a jiggling way

Damn baby Yo ass Swivel Jiggles

swivel jiggle by Hoogalac Man March 30, 2010

perch and swivel 

A profane invitation whereas the one doing the inviting is flipping a most vulgar bird to illustrate how the invitee might wish to sit on it while spinning.

I have a most brilliant suggestion for you my dear: why don’t you just perch and swivel on this?

perch and swivel by Dr Bunnygirl April 6, 2021

Swivel Rant

Usually seen on blogs and other comment sites, a swivel rant is little more than an angry run down of points/issues/people you wish to tell to go swivel.

"Did you get a response to your proposal on your blog?"

"Yeah, but nothing constructive, just a swivel rant"

Swivel Rant by Old Slaughter February 26, 2010