backlog (
http://definr.com/backlog)
n 1: an accumulation of jobs not done or materials not processed
that are yet to be dealt with; "a large backlog of
orders"
2: large log at the back of a hearth fire [syn:
log]
3: something kept back or saved for future use or a special
purpose [syn:
reserve,
stockpile]
v : accumulate and create a backlog