to know somebody or something inside out

āχāĻ‚āϰ⧇āϜāĻŋāϤ⧇ "know somebody or something inside out"āĻāϰ āϏāĻ‚āĻœā§āĻžāĻž āĻ“ āĻ…āĻ°ā§āĻĨ

to know somebody or something inside out
01

to have very good knowledge or understanding about someone or something

Idiom
Informal
āωāĻĻāĻžāĻšāϰāĻŖ
She's worked with this software extensively and knows it inside out.
LanGeek
āĻ…ā§āϝāĻžāĻĒ āĻĄāĻžāωāύāϞ⧋āĻĄ āĻ•āϰ⧁āύ