noun

• (informal, uncountable) Something distasteful or physically unpleasant to touch.
  "Like it wasn't bad enough that I was soaked to the bone, now I had to lug an ick covered designer original across a puddle filled runway."
• (informal) A feeling of revulsion.
  "to have the ick"
• (slang) Anything moaned about; a gripe.
  "How can you stand such an ick ?"

adj

• (informal) icky; distasteful or unpleasant.
  "'It's a bit ick, to be honest, but Rochelle thought it would be funny. Last year we did dragon's diarrhoea, with Tia Maria and chocolate Angel Delight, but nobody would touch it.'"

noun

• (biochemistry) Initialism of inhibitor cystine knot.
  "The composition of the venoms of the first three is dominated by short (3–9-kDa) disulfide-rich peptides that contain the inhibitor cysteine knot (ICK) motif, although heavier proteins, including enzymes, are also present. ICK peptides are structurally very stable and mainly target the nervous system, acting primarily on membrane channels or neuronal receptors^(3,4,5)."