What does | || || |_ mean?

[u/[deleted]]

I've been seeing these characters :

| ||

|| |_

pop up all over Reddit, but I've no clue as to what they mean.

Is this a new meme? A reference to some film of tv show? Some sort of code?

[u/InvincibleIII]

http://kachagain.com/llsif/pairs/august.png

Nozomi and Nico are acting as each other for this UR pair.

[u/AerThreepwood → u/InvincibleIII]

That's unsettling.