The phrase "grossed out on" is commonly used to describe feeling disgusted by something. The spelling of "grossed" reflects its past tense form, derived from the verb "gross out." In IPA phonetic transcription, "gross" is pronounced as /ɡrɒs/, which rhymes with "boss." The preposition "on" is pronounced as /ɒn/, which rhymes with "gone." So, the pronunciation of "grossed out on" would be /ɡrɒst aʊt ɒn/. Despite its colloquial usage, it is important to maintain proper spelling and pronunciation in written and spoken communication.