When someone is new to a game and gets really good RNG, so they think it's all skill not luck.
Especially big in singleplayer games since no one is there to trash talk.
Person 1: "Jim just got to gold rank yet he just started playing last week"
Person 2: "Have you seen the way he plays? All luck, no skill. Bet he's feeling "I'm So Good-itis" right now.
When you think you're so skilled, but in reality it's your teammates/characters that are doing all the heavy lifting. Resorting in you falling behind.
Josh: "wow I thought this game was supposed to be hard, I've cleared 11 stages already! I'm the best at this game". In reality Josh pulled a 5 star hero early on.
Josh was later on team wiped on stage 15, for disregarding lobby upgrades, and for not paying attention to his hero's needs/upgrades; Thus he has I'm so good syndrome.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the USCoast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.