Referring to those bib-like things, covering the front and tied with strings on the back, that Japanese babies used to wear (Kintarou famously wears one).

LaC said:

Referring to those bib-like things, covering the front and tied with strings on the back, that Japanese babies used to wear (Kintarou famously wears one).

Also referring to Binbo Taizou from Obocchama-kun, who is so poor he can only afford the front half of a suit and ties the back with strings.