do an about-face (verb) back-pedal: change mind
Sinonime: bluffing, buffoonery, clownishness,
farce, frolicking, high jinks, horseplay, jesting, joshing, kidding, making light,
mockery,
nonsense,
pretense, roughhouse, roughhousing, rowdiness,
sham*, skylarking, spoofing,
teasing,
triflingAntonime: seriousness