Definition of "go south" in English

Verb

1. To become unfavorable; to decrease; to take a turn for the worse.

   • I should have walked away from the casino when my luck went south, but I stayed and ended up in the hole.

2. To make an escape; to disappear.

3. To give somebody oral sex.

4. To rathole: to take chips off the table in a cash game without exiting the game completely, especially with the intention of limiting losses.