ham

1 ham /ˈhæm/ noun
plural hams
1 ham
/ˈhæm/
noun
plural hams
Britannica Dictionary definition of HAM
1 
: meat from the leg of a hog that is often prepared by smoking or salting
[noncount]
[count]
2 
[count] informal
a  disapproving : a bad actor who performs in an exaggerated way
b  : someone who enjoys performing and who tends to behave in an exaggerated or playful way when people are watching
3 
[count] : someone who operates an amateur radio station — often used before another noun
2 ham /ˈhæm/ verb
hams; hammed; hamming
2 ham
/ˈhæm/
verb
hams; hammed; hamming
Britannica Dictionary definition of HAM

ham it up

informal
: to act or behave in an exaggerated or playful way