The Infamous Samus Spam is a technique used by Jonathan when he plays Super Smash Bros. Brawl, the Super Smash Bros. Brawl mod Project M, or Super Smash Bros. for Wii U.
To start off, Jonathan rolls back once. Then, he shoots three Super Missiles using Samus' side special. After that, he charges up her neutral special, Charge Shot. Then, he keeps shooting Super Missiles until they hit a player or their shield. When one hits, he shoots another one and then releases the Charge Shot. If he is playing Project M, he will not roll back in fear of accidentally air dodging off the cliff. He got this technique from a video called Top 10 Most Annoying Playstyles in Smash 4, and Number 1 was the projectile spammer. The video showed Samus spamming projectiles. When Jonathan uses this style, as he most often does, it is annoying to most, so annoying that sometimes Jonathan's friends don't let him use Samus.