The phrase "little clowns" typically refers to children or people who act silly or funny, like clowns in a circus. It suggests that the individuals being referred to are being playful or entertaining in a lighthearted way. Full definition
Guest, Standing on the Shoulders of little Clowns, UCCA, Beijing. (antenna-space.com)
He's our favorite little clown, who loves to sing, still suckles his «Precious» fleece toy, bounces like a little jumping bean when he sees his favorite humans, and he always has time for a good bum scratch! (sippetsandsharpies.com)
Name one current Uruguayan production car while you're at it, you racist little clown. (evo.co.uk)