123movies · noun1
Genericized trademark of 123Movies.
123Movies · proper noun, noun2
Genericized trademark; from 123Movies, an unauthorised (illegal) network of file streaming websites operating from Vietnam which allowed users to watch films for free; launched around 2016 and formally shut down in 2018. The noun sense is derived from the prominence of 123Movies.
Etymology from Wiktionary, CC BY-SA 4.0.