The phrase typically refers to features or tools that claim to let you simulate a bot attack (e.g., joining a server with many fake players to cause lag or stress) without paying for premium botting software.
Then run /whitelist add [your_real_players] . Bots can't join without being on the whitelist. This is a for small servers. minecraft bot attack free
Stopping the Storm: How to Protect Your Minecraft Server from Bot Attacks for Free "Minecraft bot attack free" The phrase typically refers