From Wiktionary, the free dictionary
Literally, “ the beast will catch ” . From the phrase se correr o bicho pega, se ficar o bicho come ("damned if one does and damned if one doesn't", but literally "if you run, the beast catches you; if you stay, the beast eats you".)
( Brazil ) IPA (key ) : /u ˈbi.ʃu ˈvaj peˈɡa(ʁ)/ [u ˈbi.ʃu ˈvaɪ̯ peˈɡa(h)]
( Brazil ) IPA (key ) : /u ˈbi.ʃu ˈvaj peˈɡa(ʁ)/ [u ˈbi.ʃu ˈvaɪ̯ peˈɡa(h)]
( São Paulo ) IPA (key ) : /u ˈbi.ʃu ˈvaj peˈɡa(ɾ)/ [u ˈbi.ʃu ˈvaɪ̯ peˈɡa(ɾ)]
( Rio de Janeiro ) IPA (key ) : /u ˈbi.ʃu ˈvaj peˈɡa(ʁ)/ [u ˈbi.ʃu ˈvaɪ̯ peˈɡa(χ)]
( Southern Brazil ) IPA (key ) : /o ˈbi.ʃo ˈvaj peˈɡa(ɻ)/ [o ˈbi.ʃo ˈvaɪ̯ peˈɡa(ɻ)]
( Portugal ) IPA (key ) : /u ˈbi.ʃu ˈvaj pɨˈɡaɾ/ [u ˈβi.ʃu ˈvaj pɨˈɣaɾ]
( Northern Portugal ) IPA (key ) : /u ˈbi.t͡ʃu ˈbaj pɨˈɡaɾ/ [u ˈβi.t͡ʃu ˈβaj pɨˈɣaɾ]
( Southern Portugal ) IPA (key ) : /u ˈbi.ʃu ˈvaj pɨˈɡa.ɾi/ [u ˈβi.ʃu ˈvaj pɨˈɣa.ɾi]
o bicho vai pegar
( Brazil , slang ) things will go wrong if nothing is done
( Brazil , slang ) indicates that something dramatic or intense will happen