To make a (video) chat lag and/or freeze by spamming the comments. Usually due to a large amount of lurking people suddenly reacting to someone appearing on the webcam after hours of staring at a table/notebook/etc.

Coming from Ryland Blackinton's (Cobra Starship) "Who froze Jesus?" reaction to someone's "Jesus it's frozen" comment upon the sudden lag in the video.

Also see shelf kids.