if you know, you know

== English == === Pronunciation === (General American) IPA(key): /ɪf ju noʊ ju noʊ/ (Received Pronunciation) IPA(key): /ɪf ju nəʊ ju nəʊ/ === Phrase === if you know, you know (informal, humorous) Used to signify a reference or allusion to something that is only understood by certain groups of people. Synonyms: IYKYK (initialism), those who know ==== Translations ====