Ichor

Ichor is a crafting material dropped by Ichor Stickers in the Hardmode Underground Crimson. It is the Crimson counterpart to the Corruption's Cursed Flame, however does not appear to be unholy or evil. (See the tooltip for Cursed Flames and then Golden Shower, and even this page.)

Tips
Ichor does not burn up in lava, so pouring lava on Ichor Stickers is a possible way to collect Ichor.

Trivia

 * Ichor, in Greek mythology, is the golden ethereal fluid that flows in the blood of gods and immortals, as said in the item's description. It also means a discharge from wound or ulcer, which fits more to the disgusting theme of Crimson, but the description of ichor specifies that it was meant as the gods' blood, although this still just about seems bloody like the Crimson.
 * It can be pronounced "aye-car", "aye-kur", "ih-kor" or "ick-er".