lightweight
noun
1.
a professional boxer who weighs between 131 and 135 pounds
2.
someone who is unimportant but cheeky and presumptuous
Derived from:
lightweight 3.
an amateur boxer who weighs no more than 132 pounds
4.
a wrestler who weighs 139-154 pounds
5.
A weight class division in combat sports, for fighters heavier than those in the featherweight division and lighter than those in the welterweight division.