Je Suis timbré and I Am Going Postal

go postal To lash out violently and at random, often in a blind rage. Term taken from the 1990's incidents of workplace violence involving US Postal System workers. I was so angry at work with the new workload, I was afraid I'd go postal.

(Taken from Urban Dictionary. More information about this term here.)

I was amazed when I discovered this meaning in English. I don't think we have a similar expression in my language (or, at least, I can't recall it). But do you know how to say stamp in French? It is timbre. And être timbré means 'to be a bit crazy'. Do you know any other expression like these?

Christophe (France) maybe is also a bit timbré (nothing to do with the fact that he has a mail art project about teeth). He sent this funny comic: 

-Qui est ce qui vous amène? Déshabillez-vous!

-Je vous. Vous avez attrappé une bonne mailartite... rien de grave! 

Juste un peu timbré. Prenez un cachet per timbre...

In case you don't read French: t is about a patient who went to the the postologist (postologue). The doctor examines him and discover that he has mailartitis (mailartite). Fortunately for us all, this is nothing serious... We just need to take a stamp an envelope :-)