Having a big dick
Marty tested positive... for having a big dick
Getting positive results on a medical examination for diseases, meaning you have that disease/health problem.
Guy 1: Bro, I tested positive for HIV! I'm doomed!
Guy 2: Thankfully my HIV tests came back negative.
When you've spent heaps of days in iso and are itching to get out to see your mates in RL
Oh man, this isolation test is killing me. I reckon I'm about three days from breaking curfew and heading to Liam's for some chalkies.
In other words, you farted out da vaporous by-products of da experimental medicine dat was administered to you.
I took a big swallow of da newly-invented elixir dat da hippie-medicine guru gave me to see if it would help my stomach-bloating, and then emitted humongous clouds of sulfurous methane soon afterwards, so I guess I "passed the test" with flying colors!
You want to try something out? You give it a try to see what it'll do.
I'm using this for a experiment-no rather than a definition I want to publish but I have to try to make up a definition for this first. Test!