not to be confused with craigs-hook, this is an offensive term used to describe someone's lover or mistress that, as the name implies, they picked up as a result of a previous craigs-hook, which evolved into an on-the-side (lover or mistress) relationship.
a hard working husband comes home from work, only to find his wife in bed with their friend's teenage son. he then asks his wife:
husband: um,Barbara sweetie, what exactly do you think you are doing? Is Kyle your new craigshook?
wife: no, Adrian. well, yes he is a craigs-hook, since I picked him up on Craigslist and he asked me to decougar him.
husband (adressing the teenager): so you are a mommy-grabber, you bastard? If so, you don't deserve a a craigs-hook with my wife, but a bloody left hook. And you don't deserve to be my wife's craigshook either, since I will now kick you out of my house for ever.