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5.
a very long turd which has been sitting inside you for quite a while. Other turds have passed by into the poo bin but the backlog just sits there and builds up. One day you will clear the backlog and when you turn around for the inspection you will be totally amazed. You'll also feel a bit empty!
Glad I've cleared that backlog.
by doctor filth October 05, 2007
 
1.
When used referencing video games, a backlog is used to describe the pile of unplayed and/or unfinished games that a person owns.

It is another term for "stack of shame."
Due to my never ending love for Skyrim, many of the games in my backlog remain untouched.
by Zephyius May 22, 2012
 
2.
The lone chunk of fecal matter that pops back out of the bottom of the toilet after a flush; usually a floater
I needed to flush the toilet three times this morning. I had a backlog that refused to go away.
by TurboShortBus October 06, 2005
 
3.
Shit that gets backed up in your colon and lower intestines as a result of neglecting your need to take a dump. Usually back logs are characterized by taking a dump, then about 10 minutes after you get off the toilet, you have to go back and take another dump that is roughly equal in size the first dump. Back logs are generally not healthy and are detrimental to regularity in your bowel movements.
Susan only takes a shit once a week. She's gotta have back logs, dude.
by LazySlacker June 18, 2005
 
4.
'Back- log', refers to the amount of time that you have not masturbated for and so you have a 'Back- log' because eventually it will all come out. :)
Chris: Oh dude, i'm hating this holiday - a whole week of Back- log

Simon: Yeah, tell me about it, i'm gonna have a huge one when i get home
by asdqwezxc August 04, 2011
 
6.
A backlog occurs when a man, for reasons sometimes unknown, hasn't ejaculated in a long period of time. After this dry spell ,when the man ejaculates what emerges is reffered to as the backlog. This backlog is usually a massive amount of abnormally thick jelly-like cum that has been stored by his testicles over this period of time, and if not handled correctly can cause a massive mess. Backlog frequently occurs in men that are in relationships becuase they are so caught up by their girlfriend that they forget to regularly service themselves.
Guy 1: Hey man, I finally broke my dry spell after I broke up with Julie last night.
Guy2: Wow really? What was the damage?
Guy 1: Nothing much, just a serious amount of backlog and a serious mess afterwards.
by MrMortimer69 May 10, 2011