let someone's hair down

Non-invasive genotyping of the endangered Apennine brown bear: a case study not to let one's hair down
let one’s hair down
SHAGGY WON'T LET HIS HAIR DOWN HE'S RACKING UP THE HITS BUT STILL REFUSES TO RELAX
WIM DIDN'T LET HIS HAIR DOWN - IT'S TOO TIGHTLY PERMED; Says JONATHAN GOULD
LA DARES DEMOCRATS TO LET THEIR HAIR DOWN
An addiction to work, but Norcross can let his hair down -- or shave it off
Wahoo's Lets Hair Down (More) in Colorado Spots
Disco Chance to Let That Hair Down
The Town Hall Relaxed And Let Its Hair Down
Disco chance to let that hair down.(Features)