1) the sixth sense you develop after spending any serious length of
time frequenting IRC that tells you, before you even click, that something
disgusting is on the other end of the
link someone just sent you.
2) A primitive stage of development of the above, where the realisation manifests itself soon after the link is clicked, but not early enough to click out of it before the image in question appears.
1) "I'm not
clicking that, man, my goatsesense is tingling"
2) "Damn
dude, my goatsesense went off but I couldn't click out in
time".