Pronunciation: [pˈʊl fˈast ˈɒn] (IPA) 
The phrase "pull fast on" is often used in sailing to indicate that someone should quickly tighten a rope or line. In terms of spelling, "pull" is pronounced /pʊl/, with a short "u" sound followed by the L sound, while "fast" is pronounced /fæst/, with a short "a" sound and the S sound. "On" is pronounced /ɒn/, with a short "o" sound and the N sound. When pronounced together, the phrase sounds like "pul-fast-awn."
"Pull fast on" is a phrasal verb that refers to the act of rapidly accelerating or increasing speed. It is commonly used in the context of driving or operating a vehicle, although it can also be used in other situations that involve movement or progression in some form.
When someone pulls fast on the accelerator or throttle of a vehicle, they forcefully push it forward or press it down in order to go faster. This action results in a sudden increase in speed or power, often with the intention of overtaking or quickly moving past other vehicles on the road. "Pull fast on" can also be applied to other means of transportation that involve acceleration, such as boats or airplanes.
However, this term is not limited to literal transportation. It can also be used metaphorically to describe situations where someone or something rapidly progresses or advances. For instance, in a business setting, one might use the phrase to describe a company that quickly grows or expands its operations.
In summary, "pull fast on" means to accelerate or increase speed rapidly. It implies a forceful action or movement, whether it be in a literal sense with vehicles or in a metaphorical sense with progress or advancement.
