NB! It seems this console command is not compatible with CS2.
Command Profile

NET_FAKEJITTER

CS:GO

This command will will cause your client to "jitter" (fake lag) for the specified amount of milliseconds.

Syntax
net_fakejitter [Milliseconds]

Description

This command will will cause your client to "jitter" (fake lag) for the specified amount of milliseconds.

How To Use net_fakejitter

  1. Enable the developer console in Counter-Strike settings.
  2. Open the console with the tilde key (~).
  3. Enter net_fakejitter [Milliseconds], replacing bracketed arguments with the value you want, then press Enter.

This legacy command is not currently listed as compatible with Counter-Strike 2.

Syntax And Arguments

net_fakejitter [Milliseconds]
Milliseconds The amount of milliseconds to fake jitter for. 1000 = 1 second.