The act of forcing your arms behind your back whilst sticking head forward usually in confusion while stating ones point. The point is usually wrong and unprofessional
To turn your head while passing by something/someone or someone/something is passing by you. Either slowly turning your head to track your eyes on the spectacle or to repeatedly turn your head to keep looking at it.
When you're discussing something geeky very intensely.
When you know a lot of information about something unusual, usually nerdy, and express it with great enthusiasm.
Bruce: Batman never killed his villains until Robin died, which is the onlyreason why people began to call him 'The Dark Knight'. And in the series 'The Dark Knight Returns', Robin was a girl after Jason died.
Wayne: Dude, relax. I only said I was excited for The Dark Knight.
Bruce: Sorry, I was nerding out for a minute there.