Camp it up
Definition 1 of 1
Pro Tip 1/3Playful Use
Used to describe someone being intentionally over-the-top for fun, often in entertainment. 
The comedian decided to camp it up with his absurd costume and mannerisms.
Pro Tip 2/3Not Serious
Implies humor or irony; not meant to be taken seriously. 
He loves to camp it up at parties by telling outlandish stories.
Pro Tip 3/3Colloquial Speech
Considered informal and mostly used in casual conversation or artistic performances. 
When she's with friends, she often camps it up to get a good laugh.