つるぺったん Touhou
"Moji Pittan" is a Japanese word puzzle video game
"Harupittan" refers to a Hare Hare Yukai / Moji Pittan crossover video
The bridge ("Hito no yo ni~") is to the music of the bridge from Let's Go! Onmyouji. "Akuryou taisan" and "douman seiman" are from Let's Go! Onmyouji neta ("Puyopuyo suru na!" (Don't turn all squishy!) is a common mishearing of one of Hikomaro's lines during his speech in the middle)
The "Youjo youjo tsurupeta youjo" fragment sounds a lot like the infamous "tasukete Eirin!" part of 竹取飛翔　～ Lunatic Princess, whereas "Tsurupeta tte iu naa" is most likely a reference to the flash video for 患部で止まってすぐ溶ける　〜 狂気の優曇華院.
The chorus is roughly the same as the chorus of the theme song from Moji Pittan
"Tokachi tsukuchite" is a Nicovideo IDOLM@STER-related meme involving a misheard lyric ("tokashi tsukushite") in the Futami Ami song "The Agent Travels Through the Night".
"Oyashiro-sama" and "Onikakushi" are terms from Higurashi no naku koro ni, which also features most of the other things mentioned in those two lines.
Miko Miko Reimu -- most likely a nod to 'Miko Miko Nurse'
The translation of the title, DFC is an abbreviation of Delicious Flat Chest - a meme describing girls with flat chest, though it can be used to refer to lolis(Some may say otherwise).
Tsurupettan, along with several other songs by IOSYS and Touhou is a song that is included in the video Nico Nico Douga Kumikyoku
Kanji