The phrase "spliff up" is often used informally to describe tidying, sprucing or cleaning up a space or individual's appearance. There are a plethora of synonyms that can be used in place of "spliff up" depending on the context of the situation. Words such as polish, groom, refurbish, smarten, neaten, spruce, tidy, decorate or renovate can all be used in place of "spliff up." These synonyms offer a range of options for describing the act of improving or refreshing the appearance of something or someone. By selecting alternative words to describe this action, a speaker or writer can add variety and clarity to their language.