Trying to be cool, but ultimately very uncool indeed, and often even extremely embarrassing

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."

Idiots who try to make themselves look good in public but really are embarrassing.

Something cheesy or lame

Something a person(s) says/does that is so embarrassing and lame, that it annoys others.

Something presented as fresh or original, but which is actually tired and/or lame. Especially, when its lameness derives from being obvious or done to death.

A concept invented to keep people consuming and creating never ending fads.

A concept to doubt yourself and your place within society so that you have to "tune in" to latest fad or latest social construct to remain relevant. If you feel out of place you can get a mental illness..... and fail to love yourself and try to change your idiosyncrasies.....

What is corny to one is not necessarily corny to another.