Xǔ Fěi 許棐 (d. 1249, birth date unknown — active Jiāxī through Chúnyòu eras, c. 1237–1249), zì Chénfū 忱夫, sobriquet Méiwū 梅屋 (“Plum Cottage”), was a native of Hǎiyán 海鹽 (in modern Zhèjiāng). He never held office and lived as a recluse at Qínxī 秦溪 in Hǎiyán, where his hermitage gave its name to his collected works. He was one of the more prolific second-generation Jiānghúpài 江湖派 poets, working in the wake of the 1226 Jiānghú shīhuò 江湖詩禍 (the so-called “Jiānghú poetry disaster”) that had ensnared Chén Qǐ 陳起 and Liú Kèzhuāng 劉克莊. He was on close terms with the bookseller-anthologist Chén Qǐ (whom he addresses as Zōngzhī 宗之), with Liú Kèzhuāng, and with the senior Jiānghú poet Gāo Jǔ 高翥 (zì Jújiàn 菊磵); he revered the Yǒngjiā Sìlíng 永嘉四靈 poets (especially Zhào Shīxiù 趙師秀 zì Zǐzhī 紫芝) as his immediate poetic ancestors.
His surviving collected works are the Méiwū jí 梅屋集 in five juàn (KR4d0359), in which he himself divided his output into four chronologically numbered sub-collections of poetry plus a fifth juàn of miscellaneous prose. The Bá Sìlíng shīxuǎn 跋四靈詩選 in the prose juàn is one of the most explicit contemporary statements of late-Sòng Jiānghúpài poetic genealogy.