Acting out based on uncontrollable autistic or obsessive-compulsive urges; an autistic meltdown, or in a broader sense any sort of unusual behavior resulting from a psychological or psychiatric condition. See also reeee.
"I was just trying to chill, but this bitch won't stop tizzing out and making everyone nervous."
"I tried to organize the garage, but Captain Tizz here couldn't control their OCD and just ruined the last 3 hours of my work by tizzing out and stacking everything back up to the ceiling."
"Stop tizzing, you're making everyone here feel awkward and you look like a complete moron."
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.
A lighthearted reaction upon receiving disappointing news of some sort. Usually something that isn't a particularly a big deal, esp. when it primarily affects someone else - sort of a mild schadenfreude. Sometimes doubled or tripled, and possibly said in a sing-songy voice for added comedic effect to imitate a muted trumpet, which is how the meme originated.