SLAM is an acronym for 'Sound Level Assessment Method' and SLANGILY is an adverb meaning in a slangy manner. SLAM is a method used to measure the sound level of a particular environment, such as a workplace or a concert venue. It is used to ensure that the sound levels are within acceptable limits and to protect people from potential hearing damage. SLANGILY is often used to describe speech or writing that uses informal language or words that are not part of standard English.