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

M_SIDE

CS:GO

This console command is used to set your mouse side factor.

Syntax
m_side [Side Factor]

Description

This console command is used to set your mouse side factor.

Syntax And Arguments

m_side [Side Factor]
Side Factor The side factor you want to set this command to. The default value is 0.8.