keep / have (all) one's wits about sb

/kˈiːp hav ˈɔːl wˈɒnz wˈɪts ɐbˌaʊt ˌɛsbˈiː/

/kˈiːp hæv ˈɔːl wˈʌnz wˈɪts ɐbˌaʊt ˌɛsbˈiː/

to keep / have (all) one's wits about sb

to be prepared to handle things properly in case of danger or unpleasant events