IDIOMS

show up

(transitive) To make visible; to expose.

Example:   Please come on time; don't just show up whenever you feel like it.
  No matter how many I throw away, more copies always show up.
  I finished in five minutes and she showed me up by finishing in three.
2014, Daniel Taylor, "World Cup 2014: Uruguay sink England as Suárez makes his mark," guardian.co.uk, 20 June:
  His team were not outclassed but, once again, England have reminded us of their habit of being shown up as soon as they face half-decent opposition and one or two authentic category-A footballers.
  I bet the Jayhawk fast break could show up the Nimrod's lack of speed.