look up any word, like the eiffel tower:
 
1.
where you send an email, usually to a large audience which is critical or non complimentary about a person or company etc, which you really, really shouldn't have sent

As Stephen Fry said "The email of the species is more deadly than the mail"
wow, Joe's had another outburst of email tourette's ; he'll be fired for this one
by jfd100 December 21, 2013