Def by chocolate?

Hello world, you have got to taste this ~ Ice cream, a little syrup, and eskimo-pie style topping!

In the TV ad, Aoi Miyazaki 'dissolved' in a rocking chair surrounded by cuckoo clocks:
http://www.glico.co.jp/ice/cm/index_df.htm

By the way, a word that sounds like 'Def' (デフ) is a term used by Japanese people with hearing impairment to describe themselves.