noun
sweet tooth; love of sweet things
Describes a person who likes sweets or the trait itself. Often used in phrases like 甘いもの好きな人 or 甘いもの好きにはたまらない.
彼女は甘いもの好きで、毎日ケーキを食べている。
She has a sweet tooth and eats cake every day.
甘いもの好きには、このチョコレートは最高だ。
For those who love sweet things, this chocolate is the best.
甘党 is a more concise noun meaning 'sweet tooth' or 'person who prefers sweets to alcohol', while 甘いもの好き is a descriptive phrase literally meaning 'liking sweet things'.
Compound of 甘い (sweet) + もの (thing) + 好き (liking). The reading ずき is a rendaku form of 好き.