Just like the acronym ASAP, does the phrase "as quickly as possible" has a similar abbreviation?
Technically there is an acronym, AQAP, for "as quickly as possible". Unfortunately, it is only used within the military and is not something you will hear in conversation outside of that area. You will find that if someone wants to say, "as quickly as possible", in a shorter way they will still just say ASAP. This is because the nuance of the two phrases is similar enough to not affect the meaning, therefore they can be interchanged. Ex: I need to get home as quickly as possible. = I need to get home as soon as possible. = I need to get home ASAP.