1) Antics 2) Clowning 3) Harlequinade 4) Japery 5) Prank 6) Zaniness 1) Clowning 2) Craziness 3) Folly 4) Foolery 5) Frivolity 6) Harlequinade 7) Indulgence 8) Lunacy 9) Prank 10) Tomfoolery 
• (n.) The arts and practices of a buffoon, as low jests, ridiculous pranks, vulgar tricks and postures.
Buf·foon'er·y noun ; plural Buffooneries [ French bouffonnerie .] The arts and practices of a buffoon, as low jests, ridiculous pranks, vulgar tricks and postures. « Nor that it will ever constitute a wit to conclude a tart piece of buffoonery with a 'What makes you ...
[n] - acting like a clown or buffoon
clowning noun acting like a clown or buffoon