Definition - What does Smurfing mean?
In an IT context, smurfing is a type of denial-of-service attack that relies on flooding a network with a large volume of traffic through the manipulation of IP addresses in that network. This type of attack can result in a high volume of excess activity, which can overwhelm a server or IT setup.
Techopedia explains Smurfing
Although smurfing can be effective in theory, many network administrators have learned to deflect this kind of attack by simply disabling IP broadcast addressing, which allows for this kind of system-wide signaling.