foamed up

Verb

foam up (third-person singular simple present foams up, present participle foaming up, simple past and past participle foamed up)

1. (intransitive) To become foamy, create a foam; to rise with a foamy surface or covered with something resembling foam
   • In a chastened mood, Helen returned to her own room and lit her spirit-lamp, in order to re-boil the coffee. She was watching the brown bubbles foam up in the saucepan, when she heard the front-door bell.1933, Ethel Lina White, chapter 12, in Some Must Watch
2. (figuratively, intransitive) To take place, arise, erupt, develop.
   • A tide of Republican scandal foamed up last week and engulfed Germany's greatest post-War soldier, Hans von Seeckt, “The Man with the Iron Monocle.”1926 October 18, “Portent Hatched”, in Time
3. (transitive) To cause to become foamy; to cover with foam.
   • As I routinely foamed up his grand lattes, he’d share details about his homicide cases (not to mention his rocky marriage, which was still bordering on divorce).2006, Cleo Coyle, chapter 2, in Murder Most Frothy, Penguin, page 22