口くち汚よごし

noun

tantalizing sample; small taste

A small amount of food offered to whet the appetite or as a polite gesture, often implying it is just a token portion.

• 口くち汚よごしですが、どうぞ召めし上あがってください。

  It's just a small taste, but please help yourself.

• お口くち汚よごしに、お茶ちゃ菓が子しを用よう意いしました。

  I've prepared some sweets as a little something to go with your tea.