lightweight
US /ˈlaɪt.weɪt/
UK /ˈlaɪt.weɪt/

1.
of little weight; easy to carry or lift
:
•
The new laptop is incredibly lightweight, making it perfect for travel.
•
She prefers lightweight fabrics for her summer clothes.
2.
lacking in depth, seriousness, or importance
:
•
His arguments were too lightweight to convince the jury.
•
The movie was entertaining but ultimately a bit lightweight.
1.
a person of little importance or influence
:
•
He was considered a lightweight in the political arena.
•
Don't listen to him; he's just a lightweight.
2.
a boxer or wrestler weighing more than a featherweight and less than a welterweight
:
•
The lightweight champion defended his title in a thrilling match.
•
He moved up from featherweight to the lightweight division.