When you screw something up in a really irreversible way

The act of extreme masturbation. You must "knock one out" whilst in close proximity to any of the following; Your mum, a nun, your boss, a member of parliament, George Michael. A person with capabilities to act upon catching you mid self-abuse obvisouly ups the ante. Ejaculation must be reached before your danger wank target comes (no pun intended) to investigate. The higher the chances of being discovered with one's pants down, pulling one's war face is obviously where the danger comes from. The more danger involved the harder (or softer) it is to complete the task in hand (snigger). The more dangerous the better. The chance of being arrested, pummeled by an angry father or having your hand severed by an arab's sabre means that you are a pro "Danger wanker."

noun - a being of superhuman sexual powers

adj, kwok-ly

(verb) - to deny access to a resource (usually a toilet) by occupying it or otherwise rendering it unusable (often for extraordinarily long periods time).
also kwokked (adj) - broken, unusable

hold pen in between pecs

is consider highly offencesive word that can be described as any insult. Preferably it is used in offensive sexual contex.