Pronunciation: [wɒst ˌɒn ˈʌp] (IPA)
Correct spelling for the English word "wast on up" is [wɒst ˌɒn ˈʌp], [wɒst ˌɒn ˈʌp], [w_ɒ_s_t ˌɒ_n ˈʌ_p] (IPA phonetic alphabet).