drink the Kool-Aid

verb1

•
(US, informal) To come under the influence of a leader, organization, or movement to the point of believing uncritically in an espoused idea or ideology.
- Netscape, while willing to drink the open source Kool Aid, realized there were other important issues in the commercial sector. — 1999

forms

drunk the Kool Aid · drunk the Kool-Aid · drank the Kool Aid · drank the Kool-Aid · drinking the Kool Aid · drinking the Kool-Aid · drinks the Kool Aid · drinks the Kool-Aid