Tie one on
Definition 1 of 1
Pro Tip 1/3Colloquial Slang
Used casually among friends, not in formal situations or with superiors. 
I can't wait for Friday to tie one on with the gang.
Pro Tip 2/3Heavy Drinking
Implies drinking a lot, more than just a casual drink. 
After his promotion, Joe decided to tie one on at the party.
Pro Tip 3/3Celebratory Mood
Often used when someone plans to celebrate or mark an occasion. 
It's her birthday tomorrow; she's definitely going to tie one on.