kjenne som sin egen bukselomme (to know like one's pocket) angolul

know like the back of one's hand▼(be intimately knowledgable about)
verb
[UK: nəʊ ˈlaɪk ðə ˈbæk əv wʌnz hænd] [US: ˈnoʊ ˈlaɪk ðə ˈbæk əv wʌnz ˈhænd]