Similar to 三角関数の暗記方法

Japanese wordplay

Thirty Days Hath September

Thula (poetic genre)

Memory sport

Leitner system

Word play

Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft

Hexspeak

James while John had had had had had had had had had had had a better effect on the teacher

Leet

That that is is that that is not is not is that it it is

The quick brown fox jumps over the lazy dog

Anagram

Lopado­temacho­selacho­galeo­kranio­leipsano­drim­hypo­trimmato­silphio­karabo­melito­katakechy­meno­kichl­epi­kossypho­phatto­perister­alektryon­opte­kephallio­kigklo­peleio­lagoio­siraio­baphe­tragano­pterygon

Anglo-Saxon riddles

Ambigram

Cards Against Humanity

Portmanteau

Visual gag

Capitonym

Chronogram

Spoonerism

Word ladder

Recursive acronym