lets one's hair down (verb) play: have fun
Sinonime: blah*,
bland, bromidic, clichéd,
common, conventional, cornball, cornfed,
corny, dull as dishwater,
dumb,
everyday,
flat,
hackneyed, ho hum, hokey,
humdrum*,
insipid,
mundane, noplace,
nothing, nowhere, old hat,
ordinary, pabulum,
pedestrian, platitudinous,
square,
stale, stereotyped,
stock,
stupid,
tired, tripe, trite, unimaginative, unoriginal,
vapid,
watery, wishy-washy,
zero*
Antonime: fresh,
new, original