Voiceless labial–velar fricative
A voiceless labial–velar fricative, or more accurately a voiceless labialized velar fricative and sometimes analyzed as a voiceless labial–velar approximant, is a type of consonantal sound, used in spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is ⟨xʷ⟩ or, rather ambiguously, ⟨ʍ⟩.
Source: Wikipedia — Voiceless labial–velar fricative (CC BY-SA 4.0)