He's using PSYCHOLOGICAL warfare.
We must reply in kind.
The Big Bang Theory Season 1, Episode 13
if you can't unload your
PSYCHOLOGICAL sewage on her?
The Big Bang Theory Season 9, Episode 19
Yeah, she's right. For every Newton
who had a PSYCHOLOGICAL issue,
The Big Bang Theory Season 9, Episode 10
One is a deep-seated
PSYCHOLOGICAL disturbance,
The Big Bang Theory Season 12, Episode 8
...you may be alone
because your PSYCHOLOGICAL state...
The Big Bang Theory Season 4, Episode 5