Spoofing means you are
manipulating the
information you are sending to the server.
In the case of ping spoofing, you are making your ping look
very bad so that the server can't tell if you are lagging or hacking.
Johnny is hosting a minigame where the player who stands on a rock the longest wins. Johnny started the match and used a "kill all players" command to troll but a player was ping
spoofing so his client took longer to update and ended up winning instead of it being a tied match.
Mitch is hacking on the hytale server but he is ping spoofing at
the same time to make it
difficult to know he's really hacking