flaccid

Adjective

• out of condition; not strong or robust; incapable of exertion or endurance
  • he was too soft for the army
    
  • flabby around the middle
    
  • flaccid cheeks
    

• drooping without elasticity; wanting in stiffness
  • a flaccid penis
    

Related words

• Synonyms: 
  soft , flabby