- Language: Mlabri
- Alternate names: Mlabri (Minor), Mla, Mla Bri, Mla-Bri, Mabri, Mrabri, Yumbri, Ma Ku, Yellow Leaf, Phi Thong Luang ("Spirits of yellow leaves"), มละบริ, เผ่าตองหลือง, ผีตองหลือง
- Language code: mra
- Language family: Austro-Asiatic, Mon-Khmer, Northern Mon-Khmer, Khmuic, Mlabri (SIL classification)
- Number of speakers: <400
- Vulnerability: Threatened
- Script: Thai script.
Mlabri are different from the Kha Tong Luang (Phi Tong Luang, Yellow Leaf) in Laos, who are Western Viet-Muong (Wurm and Hattori 1981). Sometimes employed by the Hmong. Some nomadic. Traditional religion.
"Spirits of the yellow leaves" is derogatory. The dialectal varieties are not mutually intelligible.