aborregarse

A critical, colloquial verb meaning to become like a flock of sheep — to lose independent judgment and follow the crowd unthinkingly (from borrego, sheep). Used pejoratively about herd mentality, especially in political or social commentary.

• La sociedad se aborrega frente a las modas pasajeras. — Society falls into herd mentality over passing trends.
• No te aborregues, piensa por ti mismo. — Don't be a sheep, think for yourself.
• Critica cómo el público se aborrega con la publicidad. — He criticizes how the public is herded along by advertising.

This word is always negative/critical — never use it to describe simple agreement or consensus; it specifically implies a mindless, uncritical following of the crowd.