Your best bib and tucker
Definition 1 of 1
Pro Tip 1/3Special Occasions
Use this phrase for events where you'd wear very formal or elegant clothing. 
He arrived in his best bib and tucker for his knighthood ceremony.
Pro Tip 2/3Outdated Term
This expression is old-fashioned and might not be understood by younger generations. 
My grandfather would always tell me to wear my best bib and tucker to family gatherings.
Pro Tip 3/3Cultural Nuance
Understanding this phrase can give insight into historical clothing practices. 
At the historical reenactment, everyone was dressed in their best bib and tucker.