Twimom UK /ˈtwaɪˌmɒm/US /ˈtwaɪˌmɑm/ noun1 •(slang) A mother who likes Stephenie Meyer's Twilight book series or the associated films.For "Twilight" fans, the Runaways' iconic power may be difficult to grasp. (And for many of those girls' Twimoms, it may be difficult to remember.) — 2010 formsTwiMoms · Twimoms