ham it up

noun

1. the part of the leg behind the knee
2. 1. the back of the thigh
   2. the thigh and the buttock together
3. the hock or hind leg of a four-legged animal
4. the upper part of a hog's hind leg, or meat from this, salted, dried, smoked, etc.
5. ☆ Informal a licensed amateur radio operator
6. ☆ Slang an amateur or incompetent performer, esp. an actor who performs with showy exaggeration

intransitive verb, transitive verb hammed, hamming