Usually typed in higher case to exemplify the yelling of the phrase, TROPHIES YO was a term coined by Hilden of the Drunken Gamers Radio podcast (also known as the Drunken Robotic Team Fremont of Panicked Gamers Live). Whenever one talks about trophies in regards to the PlayStation Network's achievement system, it is best to alter the utterance accordingly.
"And you can get gold, bronze or silver TROPHIES YO!!!!"
"TROPHIES YO!!!" - Drunken Gamers Radio
When you wake up in the morning after a night out and you see the traffic cone/for sale sign/gnome etc in your room, you have a beer trophy.
The beer trophies are distributed by the beer fairy for good drinking efforts.
In BTS song Mic Drop ft. Desiigner, the English part says "Did you see my bag? Do you see my bag? It's hella trophies and it's hella thick". They are referring that since they work hard their bag contain lots of trophies and it's heavy (thick). Since the original version is in Korean, when they sang that part in English it was funny so many people made it into a inside joke.
Snapchat Trophies are different emoji representing different achievements in the Snapchat app. It can be earned by completing various activities such as reaching a certain Snapchat score or using a particular app feature.