Wimpy (adjective)

1. Lacking courage or determination; weak and ineffectual.
2. Lacking strength or physical power.
3. Unassertive or timid.

Origin:

From the character wimpy in the cartoon strip "popeye".

Examples:

1. He was always the wimpy kid in school, getting bullied by the bigger kids.
2. The new employee seemed wimpy and unable to handle the pressure of the job.
3. He was a wimpy fighter and lost the match easily.
4. The wimpy boy was afraid to speak up and speak his mind.
5. The wimpy dog cowered under the table during the thunderstorm.