。
She's a fussy woman.
Literal
She [topic-は] fussy woman is.
小うるさい combines the prefix 小~ (slightly, somewhat) with うるさい (annoying, nagging) to create 'somewhat naggy' or 'fussy.' Despite the moderating prefix, the overall effect is still quite negative — calling someone 小うるさい is blunt and unflattering. The 小~ prefix can attach to various adjectives and nouns to soften or diminish them: 小太り (slightly chubby), 小綺麗 (neatish), 小粋 (a bit stylish). This is a productive prefix distinct from the adjective 小さい.