The correct spelling of the phrase "wast on tail" is actually "waste not, want not." This phrase is often used to encourage people to not waste resources and to be mindful of their consumption. The pronunciation of "waste not" is typically /weɪst nɒt/, with the emphasis on the first syllable of "waste" and a short "o" sound in the second syllable of "not." Similarly, the pronunciation of "want not" is typically /wɒnt nɒt/, with the emphasis on the first syllable of "want" and a short "o" sound in the second syllable of "not."