Correct spelling for the English word "weightwatchings" is [wˈe͡ɪtwɒt͡ʃɪŋz], [wˈeɪtwɒtʃɪŋz], [w_ˈeɪ_t_w_ɒ_tʃ_ɪ_ŋ_z] (IPA phonetic alphabet).
"Weightwatchings" is not a recognized word in the English language. Therefore, it does not have an official dictionary definition.