A player whose friends helped them win
Ur just a boosted ape, you could never win alone.
... it's a team game.
|Griefer||An irritating player|
|Get oofed||Get wrecked|
|Oof||Exclamation of pain or embarrassment|
When a Roblox player calls you a boosted ape, it means they think your friends are carrying you. This taunt implies that, despite having a high level or number of points, you are not actually good at a game. Instead, you are just good at being on the right team and/or having strong friends.
The ape part of boosted ape suggests you're simple, while the boosted part insinuates you've been boosted to greatness by your friends. However, if a salty Roblox player ever calls you a boosted ape, don't worry about it. The best thing you can do is to just ignore that player, and revel in your victory/points/levels instead.