What is |?
It seems to be quickly replacing <3 on facebook. As in, Love, or more specifically In Love With.
I am totally | Lindsay Lohan, even though she's a filthy girl, I've got magnums.
Pronounced "pipe". In a UNIX shell, it is used to redirect the standard output (stdout) of a command to the standard input (stdin) of the next.
ALso, in C, C++ and others, it is the symbol for the logical expression 'or'.
$ ls | grep e
^^^ outputs all entries in current directory that have the letter 'e'. Takes output of 'ls' and supplies that as the pattern grep looks for.
this || that
^^^ literally resolves to "this or that"
horizontal line- has no real name, its used in h4xx0r talk for l or part a a letter like N
||(n), |337(leet), 1337(leet),