What is the nature of your dissatisfaction with that post?
"bells and whistles" are extra embellishments or features on something
Sainsburys is a ubiquitous national chain of supermarkets, maj works at one.
![Image](http://static.guim.co.uk/sys-images/Business/Pix/pictures/2008/01/10/sainsdaviddevinsnews460.jpg)
Puffer is one of these:
![Image](http://3.bp.blogspot.com/_vQNhhZt0230/TPEDZW89sWI/AAAAAAAAAKw/Y2d9OWGHLzc/s1600/Uniqlo+puffer+jacket.jpg)
Trackies or jogging bottoms are "tracksuit/running pants"
"went hard" from "[to] go hard" - doing something to its fullest
obvo = obvious
mong = someone underdeveloped mentally, retarded or otherwise intellectually challenged. From "mongoloid" which used to be a harsh word for someone with Down's syndrome but can be used more generally. See also: spack or spazz.