lightweight

Adjective

• having no importance or influence
  • a lightweight intellect
    

• weighing relatively little compared with another item or object of similar use
  • a lightweight fabric
    
  • lightweight wood
    

Noun

• a wrestler who weighs 139-154 pounds

• an amateur boxer who weighs no more than 132 pounds

• someone who is unimportant but cheeky and presumptuous

• a professional boxer who weighs between 131 and 135 pounds

Related words

• Synonyms: 
  whippersnapper , jackanapes