/lüp thrü/
vt. To process each element of a list of things.
"Hold on, I've got to loop through my paper mail."
Derives from the computer-language notion of an iterative loop; compare cdr down (under cdr), which is less common among C and UNIX programmers. ITS hackers used to say IRP over after an obscure pseudo-op in the MIDAS PDP-10 assembler.