The phrase "made up the top of head" means to create something from memory without prior planning. The proper spelling is "off the top of my head," as "off" is the correct preposition to indicate the origin of the idea. The IPA transcription of the phrase is /ɒf ði tɒp əv mʌɪ hɛd/, with stress on the first syllable of each word. While the incorrect spelling is commonly used, it is important to note the correct spelling to avoid confusion or misinterpretation.
The phrase "made up the top of head" refers to the act of spontaneously creating or inventing something without prior planning or extensive thought. It implies that what is being said or fabricated is coming directly from one's mind or imagination, without any external sources or references. This expression typically indicates a lack of preparation or reasoned consideration, as the information or statement is generated on the spot.
When someone makes something up off the top of their head, it means they are providing an impromptu response or generating ideas without relying on facts, research, or careful thinking. It suggests that the information may not be entirely accurate or reliable, as it is not based on any concrete knowledge or evidence.
This phrase is commonly used in casual conversations to confess that the information being presented is speculative, conjectural, or unreliable due to its spontaneous nature. It can be employed when someone is asked a question but does not possess immediate knowledge or facts to provide a well-informed response, leading them to generate an answer based solely on their imagination or personal assumptions.
In essence, "made up the top of head" indicates an uninformed or unprepared state, where the response or information being given originates solely from the speaker's mind without any prior thought or research.