wimpy

/ˈwɪmpi/
adjective
  1. Weak, timid, or lacking courage; not strong or assertive.
    • He gave a wimpy handshake that made a poor impression.
    • The movie's villain was too wimpy to be scary.
    • Don't be so wimpy — stand up for what you believe in!
  2. Physically weak or feeble; lacking strength or substance.
    • His wimpy arms couldn't lift the heavy box.
    • The wimpy little plant barely survived the frost.
    • She complained that the coffee was too wimpy and asked for a stronger brew.