"Doth off top of head" is not a commonly used phrase in modern English, however, it can be broken down phonetically using the International Phonetic Alphabet (IPA). "Doth" is pronounced /dɒθ/, with a short "o" sound and a "th" sound made by putting the tongue between the teeth. "Off" is pronounced /ɒf/, with a short "o" sound and a voiceless "f" sound made by exhaling through a small opening between the lips. "Top" is pronounced /tɒp/, with a short "o" sound and a "p" sound made by releasing a burst of air from the lips. "Of head" is pronounced /ɒv hɛd/, with a short "o" sound and a voiced "v" sound made by vibrating the vocal cords, followed by a brief pause and a short "e" sound, and
"Doth off top of head" is a phrase that combines archaic language with colloquial expressions. The phrase can be broken down into two parts - "doth off" and "top of head" - which require separate definitions to gain a comprehensive understanding.
"Doth" is an archaic form of the verb "do" that is primarily associated with Early Modern and Middle English. It signifies the performance of an action or the act of doing something.
"Off" is a preposition typically used to indicate separation, removal, or the point of beginning. In this context, it implies the act of taking away or removing something.
"Top of head" refers to an idiomatic expression or phrase that suggests speaking without prior thought or without consulting any reference material or notes. It suggests responding spontaneously based on one's immediate knowledge or intuition.
Putting it all together, "doth off top of head" can be understood as an old-fashioned way of saying to respond or answer a question or provide information without taking time to consider or consult any external sources. It conveys the notion of offering an immediate and unpremeditated response based solely on personal knowledge or memory. The phrase emphasizes the idea of spontaneity and relying solely on one's own thoughts and recollections without any external aid or assistance.