5th grade bra malfunction♡ "小+五+ポロリ" It is a parody of "悟り (Satori, lit. 'enlightenment') -> 小+五+ロリ (5th grade loli)" joke. See also post #355084, post #546106 and post #803420. ポロリ (porori) is onomatopoeia of bra malfunction.