The time of day where the realest get together to create a mix of fountain drinks--a suicide. It is most common for this to take place while working at a restaurant where you have access to fountain soda. The act is done at the bottom of each hour, and a third party decides who has created the better drink, and that person reigns supreme untill the next suicide thirty.
Josh: "Hey Jason, do you happen to know what time it is?"
::clock reads 4:30::
Jason: "Yeah, its suicide thirty, time for me to defend the title."