Ilk is a certain type of person, usually a type you don't care for. The word is used in sentences like "I'm tired of you and your ilk! When you say "you and your ilk," you mean "you and everyone just like you." And that's not usually meant in a nice way.

Is ILKS a word?

Yes, ilks is in the scrabble dictionary.

What does plagues mean in English?

1a : a disastrous evil or affliction : calamity. b : a destructively numerous influx or multiplication of a noxious animal : infestation a plague of locusts. 2a : an epidemic disease causing a high rate of mortality : pestilence.