Jugemu Jugemu Goko no Surikire Kaijarisuigyo no Suigyomatsu Unraimatsu Furaimatsu Ku Neru Tokoro ni Sumu Tokoro Yabura Koji no Bura Koji Paipo-paipo Paipo no Shuringan Shuringan no Gurindai Gurindai no Ponpokopi no Ponpokona no Chokyumei no Chosuke and Jugemu Jugemu Goko no Surikire Kaijarisuigyo no Suigyomatsu Unraimatsu Furaimatsu Ku Neru Tokoro ni Sumu Tokoro Yabura Koji no Bura Koji Paipo-paipo Paipo no Shuringan Shuringan no Gurindai Gurindai no Ponpokopi no Ponpokona no Chokyumei no Chosuke
Scar's real name (Fullmetal Alchemist WTF)
Jugemu Jugemu Goko no Surikire Kaijarisuigyo no Suigyomatsu Unraimatsu Furaimatsu Ku Neru Tokoro ni Sumu Tokoro Yabura Koji no Bura Koji Paipo-paipo Paipo no Shuringan Shuringan no Gurindai Gurindai no Ponpokopi no Ponpokona no Chokyumei no Chosuke and Jugemu Jugemu Goko no Surikire Kaijarisuigyo no Suigyomatsu Unraimatsu Furaimatsu Ku Neru Tokoro ni Sumu Tokoro Yabura Koji no Bura Koji Paipo-paipo Paipo no Shuringan Shuringan no Gurindai Gurindai no Ponpokopi no Ponpokona no Chokyumei no Chosuke
Btw this name comes from Jugemu. Jugemu is a Japanese folktale about naming a baby with a ridiculously long name.You can also hear it in the Ending of the anime Joshiraku: