"Jackles jacting joices" (aka Jensen acting choices) and sometimes also "jirecting joices" (aka directing choices).
According to [https://heller-lexicon.tumblr.com/post/645765492100022272/jacting-joices Heller-Lexicon on Tumblr], it was coined by @deanwinchesterapologist (previously @ugh-all-good-usernames-are-taken) in a response to a [https://mandropascal.tumblr.com/post/641429498342096896/wair-what-does-their-directing-say-about-their#notes post by mandropascal about Misha nad Jensen's directing choices ].
It is used by fans to refer to what they deem are intentional decisions by Jensen to draw attention to "Dean’s femininity, bisexuality, or Destiel. Particularly when his lines divert from the script or on episodes he directed."
* [https://lulu-zodiac.tumblr.com/post/659800277607759872/heyy-which-scenes-according-to-you-are-the-most Examples of "Jacting Joices"] by lulu-zodiac