inflection of saber:
/ inflection of saber:

(idiomatic) God knows (I don't know; nobody knows; it is unclear)

Used other than figuratively or idiomatically: see quem, sabe. / who knows (a rhetorical question asked to show that the asker neither knows the answer nor who might know it) / who knows (asked to express the idea that anything is possible) / when directly followed by a clause: how about (introduces a suggestion)

maybe; perhaps (indicates uncertainty)

(derogatory) know-it-all (someone who obnoxiously claims to be knowledgeable on a subject)

you-know-who (known and unmentioned person)

you know better; it's your decision

Alternative form of você que sabe

like father, like son (a child will have traits similar to its parents)

the left hand doesn't know what the right hand is doing (two parts of an organisation are unaware of each other’s activities)