Several years ago I was showing my newly acquired motorbike to a few family members, it was brand new, very shinny, made in China and very proud I was too. One of the would-be admirers commented that it was a “nice looking factory custom [motorbike]”, this is of course a contradiction in terms. If you have any knowledge of bikes you can now skip to the end of this paragraph while I explain: Many bikers love to customise their machines, most do it subtly with the odd petrol tank sticker or colour matching tax disk holder but some people really go to town with everything from adding oodles of chrome or airbrushed paint jobs right through to frame reshaping, these vehicles are then known as ‘custom bikes’.  A factory custom would therefore be a bike with the appearance of customisation while in reality being mass produced.Mods?

As vapers we happily use the term ‘Mods’ to indicate the base part of an Ecig of the type which has a removable battery and/or voltage/wattage adjustment, this term has developed from it’s original usage as a shortened form of ‘modification’. True Mods are modifications of something else to make it into a Ecig device, these are often now  referred to as DIY Mods but if you think about it that is a bit daft, if it’s DIY it is a modification. 

http://www.ecigwizard.com/blog/d-i-y-mods