Get cold feet
to become timid or scared (ficar tímido ou assustado)
Many people get cold feet when they have to speak in public.
Muitas pessoas ficam assustadas quando têm de falar em público.
Jake was planning to invite Sue out but he got cold feet at the last minute.
Jake estava planejando convidar Sue para sair, mas ficou sem jeito na última hora.
José Roberto A. Igreja is the author and co-author of several ELT books, including:
A BRAND-NEW ELT BOOK!
600 Phrasal Verbs (with Jonathan T. Hogan)
Fluent Business English (with Robert C. Young)
English for Job Interviews (with Robert C. Young)
Fale Inglês como um Americano (with Robert C. Young)
American Idioms! (with Joe Bailey Noble III)