What is the X in X-mas?
to carry out or undergo defragmentation; also called defrag
defragmenting, n; defragmentation, n; defragmenter, n
1992, in computer sense, from de- + fragment. Related: Defragmented; defragmenting.
tool, file system /dee-frag(-ment)'/ (Or "defrag") To coalesce files and free space on a file system; to reduce fragmentation. (2004-08-19)