I am a sap. Around our house, a “sap” is one who is sappy. The term is our shorthand for sappy romantic, sappy idealist, sappy optimist. Its usual application has to do with a certain amount of weepiness related to things romantic, or idealistic, or optimistic.

a watery solution of sugars, salts, and minerals that circulates through the vascular system of a plant

one who lacks good judgement

I come by this trait honestly. From childhood, I remember my mother tearing up, or crying outright, seemingly at the drop of a hat. She cried at the movies. She cried over books. She cried over televison commercials. My sister and I teased her mercilessly about this. And I believe that she was somewhat embarassed by her tears.