Sixth Sensed 

When the end of a movie that has a really big twist gets spoiled for you, derived from the film "The Sixth Sense" that has been ruined for a multitude of people.

Verb: To Sixth Sense

Man: Hey, have you seen XXXXXXXXX

Woman: No, I was going to, but then it got sixth sensed, so I can't watch it anymore.

Man: Oh, bummer.

Sixth Sensed by desktop_fairy February 16, 2010

Sixth Former 

The last (optional) two years in the English schooling system.
Sixth Form comprises of the sexiest, smartest and general best that the English schooling system has to offer. It is also important to note that Sixth Formers deserve respect from all those in regular schooling, due to their fucking incredible-ness.

Pre-16Schoolkid: Wow! A sixth former! I thought they were just a legend. They're so... Beautiful.

Sixth Former: *silence*

Pre-16 Schoolkid: Ohhhh *big shining eyes*

Sixth Former by Verraxis February 16, 2012

Sixth finger 

When you want to maul someone and you pull down your pants and tell them you have a sixth finger,while using your dick to blend in, but upon further inspection they will notice they are meat gazing and feel silly.

Yo check out my sixth finger!

Sixth finger by PieKnee October 2, 2016

sixth base 

To immediately knock your sexual partner unconscious after sealing the deal on fifth base (anal)

"Yeah, I totally reached sixth base (six-based) her in the back of the head afterwards and got the hell out of there"

sixth base by Tim Gruich October 6, 2008

Sixth Dimension 

The art of smoking weed at university to forget the struggles of being broke, sleep deprived and forgetting to submit your assignments on time. By smoking weed you unlock the portal to the sixth dimension which you can then travel through, but there is no guarantee that you will ever be able to return back to your current dimension (whatever that may be).

Flatmate 1: woah theres 6 caprisuns left in the box

Flatmate 2: yeah thats because Lewis smoked some weed last night, were stuck in the sixth dimension bruh...

Sixth Dimension by Plamen_shrek December 13, 2017

Sixth Wheel 

That guy you invite to the amusement park that no one really likes that much, but you invite him anyways cause otherwise your five-person party would always require one person to sit awkwardly alone.

Tyler: Who's that guy?
Joe: ...Greg.... Sixth Wheel.

Sixth Wheel by TomTreeTop July 22, 2011

sixth base 

Doing it on a trampoline.

Straight to sixth base ... doing it on teh trampoline!

sixth base by kraftdin June 6, 2010