underperformer
1. [ noun ] (education) a student who does not perform as well as expected or as well as the IQ indicates
Synonyms: underachiever nonachiever
Related terms: student underachieve
2. [ noun ] (business) a business that is less successful than expected
Related terms: business underachieve
Similar spelling:   underperform
  undercover_work
  underbodice
  undernourish
  undercover_agent
  underproduce
  undernourishment
  underseller
  undernourished