back end 
noun
1The end of something which is furthest from the front or the working end: the back end of the car swung round...
- All its windows were blown out and it's front and back ends showed clear impact damage.
- It's hard to see the front end and the back end for parking.
- The front and back ends of the lifeboat had been blown away, and another man was clinging to the side of it.
1.1 informal The rump or buttocks: a face like the back end of a sheep...
- At least you don't spend your whole day staring at the back end of a mule.
- Wouldn't life be peachy if you had another motivation, outside of vanity and maybe one or two alleged health benefits, to drag that saggy, sorry old back-end of yours to the gym?
1.2The latter part of a period of time: the book takes us up to the back end of last year...
- Something we didn't find tedious, however, was the interview broadcast at the back end of last year.
- The feel-good-factor that started at the back end of last season has rolled on through the summer leaving fans contemplating their most successful campaign in years.
- They have come on quite strong at the back end of the season and this will be a tough game.
adjective [attributive]
1Relating to the end of a project, process, or investment: many annuities have back-end surrender charges
2 Computing Denoting a subordinate processor or program, not directly accessed by the user, which performs a specialized function on behalf of a main processor or software system: a back-end database server...
- Have all their systems integrated with their back-end databases for realtime information storage and retrieval.
- This seems a little harsh especially when we consider that an attempt by hackers to access the back-end system behind the website failed, according to reports.
- Most often, these applications access a back-end database to serve dynamically generated content to the users.
- play someone up
- play something back
- play something by ear
- play something down
- play something for laughs
- play something out
- play something up
- playstead
- play street
- playsuit
- playtest
- playtesting
- play-the-ball
- play the devil with
- play the field
- play the game
- play the giddy goat
- play the market
- play the percentages (or the percentage game)
- play therapist
- play therapy
- plaything
- playtime
- play to the gallery
- play truant