Goy sihdirsin is a very common phrase in Turkish, which is also very informal and offensive. It's literal meaning is let it go away. It is mostly used to show that you don't anymore care about him/her, in an aggressive way, and you just want to get rid of him/her.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.