ham:
(plural: ‘hams‘)

a ham, a ridiculous actor who overacts
an actor whose acting is unnatural, especially with improbable movements and expressions;
a person who receives and/or sends radio messages using his own device/apparatus;
an amateur radio operator,

a licensed radio ham, operating an amateur radio band
Only after his second film, the young actor has lost his charm over his audience who have begun to see him as a ham.
The director was so furious with the lead actor for not showing the right expression in that particular romantic scene that he called him a mere ham for everybody on the sets to overhear!
Lorry set up an amateur radio station some five years ago and has been a licensed radio ham since then.
Most radio hams in the USA and Canada get their licenses from the authorities after doing a course at any local Amateur Radio Club and getting their Amateur Radio Operator Certificate.

(sliced ham, meat from the hind leg of a pig)
