One who does not decide whether to spit or swallow until the moment of ejaculation, during which the "cum gambler makes an impromptu decision as to how to handle the situation
"Yo, she half spit up my semen, bro. What a cum gambler. It seemed like she didn't know what to do"
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.