1. (non-pejoratively, uncommon use) To fervently subscribe into a cause or belief with passion and energy.
2. (pejoratively, common use) To heavily buy into a cause or belief that is utterly doomed to
failure and disgrace with complete disregard to all reasoning, evidence, and intuitions that clearly indicate such a result. Referring to an inability or unwillingness of someone to be persuaded out of believing obvious nonsense -- even when confronted with the facts -- often times out of a sense of
loyalty to a group identity even if there is no reason to do so. Generally implies the complicity of an individual or a group of people in their own deception
irregardless of whether or not they realize it.
1. (non-pejoratively, uncommon use) Sharice is committed to protecting the environment, and if she has to drink the kool-aid to do so, then so be it.
2. (pejoratively, common use)
Karen is so
crazy that she's investing
money in Sears and for some bizarre "reason" thinks that they will be "restored to their former glory." She's sure into drinking the kool-aid.