Top definition
The moment when a gathering of people apply group-think and act upon it as one. Usually associated with Liberals, Democrats, Socialists, Communists, Black Lives Matter, Anti-fa and most other Leftist fringe groups. Almost always involves parroting, threatening behavior, name calling and in some cases, violence.
Remember that time when the MSM outright lied and the Liberals all started to chant to impeach the President after Time magazine posted that picture on the cover claiming that the kid was separated from her mother?

Yeah, the 'tards really fell for it and totally went from Full Potato straight into lemmingism on that one.
by Dustball443CA June 24, 2018
Get the mug
Get a Lemmingism mug for your coworker Helena.