Passikoff is spelled with two S's, not one as some might expect. The word is pronounced /pæsɪkɔf/, with stress on the second syllable. The double S reflects the original Yiddish spelling, which uses two Hebrew letters pronounced like "s". Passikoff is an adjective meaning "exasperating" or "annoying" in American English, often used in the phrase "passikoff factor". Despite its origin in Yiddish, the word has become a part of mainstream English vocabulary.