The common phrase "made off top one head" is often misspelled or misheard as "made off the top of one's head." The correct spelling uses the preposition "off," not "of." Additionally, the phrase is typically spoken with stress on the word "top" and the indefinite article "one" is often dropped in casual conversation. The IPA transcription for the phrase is /meɪd ɒf tɒp wʌn hɛd/ with the stress falling on the second syllable of "head."