Switch — The bit that gets spilled when you’re gender fluid.

Dub — Various strains of tweaked BBQ reggae made by bearded white people in Wellington.

Rail game — Generally played with a mirror and lines of MDMA until nobody can stop dancing.

Frontside switch-up — An amorous meeting in the fleshpots of Asia, where you get more than you bargained for; a surprising nocturnal ladyboy encounter, the photographs of which will never be posted on social media.    

Over-shoot the landing — Successful conclusion of a sexual encounter by practitioners of the Withdrawal Method (AKA Vatican Roulette).

Double Daffy – When driving at speed while heavily under the influence of drink and drugs, this technique has you covering one eye with your hand to prevent double vision.

Screamin’ Seaman — A painful inflammation of the urethra caused by a bacterial infection accidently picked up off a toilet seat. In a brothel. Named after 1970s pro freestyle skier, Curt Seaman, who was a frequent visitor to Amsterdam.

Cossack — Traditional shock troops of the Russian Tsars and, hence, a spread-eagle that’s taken past the point of no return into a position that would make Rasputin wince.

Cork — The kind of off-axis trick that opens champagne bottles at the Olympics.

Nose butter — Nothing that can’t be fixed with a strong course of antibiotics.

Shifty — That friend with a migratory-bird-like homing instinct that draws them to the red-light district of a foreign city within 15 minutes of alighting their plane. 

Zero Spin — A trick you only see when the subject under discussion isn’t controversial.

Tail grab — No longer seen on the competition circuit due to the success of the #metoo movement.

Critical grab — A misogynistic seduction technique as practised by Donald Trump.

Knuckle — An area of the landing zone, or someone’s hand, that it’s best not to connect with your eyebrow.

Spread eagle — A star-jump on skis. Get your mind out of the gutter, FFS.

Flair — A certain flamboyance in dress and manner that is perfectly acceptable nowadays.

Half pipe — Shunned by the more sophisticated crack smoker as only 50 per cent full.

360 — Julian, Roman Caesar, is proclaimed emperor by the Gallic legions in Lutetia (modern Paris).

720 — the Umayyid Caliph Umar II is poisoned by a servant, and dies in Aleppo (Syria) after a three-year reign.

1080 — Ísleifur Gissurarson, the first bishop in Iceland, dies while giving mass in Skálholt Church.

1440 — Itzcóatl, Aztec ruler of Tenochtitlan, dies and is succeeded by Moctezuma I.

An extract from the book— Skibum Life by Sam Masters.