whose, who's

Whose or whose means belonging to whom  --
Whose burrito is this?
Whose car is that? They left the lights on.

Who's or who's is a short or informal form (contraction) of "who is"--
Who's eating the burritos?
Who's going to volunteer to work this weekend?

Now that you know that you can say--
"Who's eating whose burritos?"

Note--"who's your" is a contraction ( short, informal form ) of "who is your?"--
Who's your homeroom teacher?
Not to be confused with "hoosier" meaning a person from Indiana, or a description of Indiana--
They wanted to visit the hoosier state to watch college football.