What is the meaning of this expression ? 腕に + an Object + 押しくら饅頭 (pushing something towards someone ??)


Hope someone can help me understand correctly this action/ expression.

MC come to watch his senpai practicing beach volley ball, then MC describes
his senpai's action :" **ムニュっと腕に豊満すぎるY先輩のおっぱいが押しくら饅頭** "

I can only guess its meaning: (please correct me if I was wrong)

1/ His senpai using her arms to push her cleavage together

2/His senpai push her boobs toward MC's arm




The 押しくら饅頭 is just a pun and does not particularly mean more than
押す/押し付け（られている）.

As for your understanding, it is more just 2 and there is no implication (from
that sentence alone) about cleavage.

  * ムニュっと : onomatopoeia describing something soft (in this case, breast) pushing against something
  * 腕に : to the arm (this should refer to MC's arms)
  * 豊満すぎる : too voluptuous
  * Y先輩のおっぱいが : Y senpai's breast
  * 押しくら饅頭 : pushing

* * *

But generally, this kind of pun is literally meaningless. I think the pun in
question is made in the same way as [what is listed in 掛詞
here](https://ja.wikipedia.org/wiki/%E5%9C%B0%E5%8F%A3).

Picking a few (famous ones)

  * あたり前田のクラッカー - 「当たり **前{まえ}だ** 」と「 **前田{まえだ}** のクラッカー」
  * 恐れ入谷の鬼子母神 - 「恐れ **入{い}り** ました」と「 **[入]{いり}** 谷{や}の鬼子母神」

The first phrases are made simply by joining the bold parts - again simply
because they share the same sound. For the one in question, similarly **押し**
付けられている and **押し** くら饅頭 are joined.

Another thing is that probably 饅頭 refers to breast.

