1.
If something shows up or if something shows it up, it can be clearly seen or noticed.
You may have some strange disease that may not ~ for 10 or 15 years...
...a telescope so powerful that it can ~ galaxies billions of light years away...
PHRASAL VERB: V P, V P n (not pron)
2.
If someone or something shows you up, they make you feel embarrassed or ashamed of them.
He wanted to teach her a lesson for showing him up in front of Leonov...
PHRASAL VERB: V n P
3.
see show 12