Drink somebody under the table
Definition 1 of 1
Pro Tip 1/3Avoid Literally
The phrase is often used figuratively and does not mean literally drinking someone under a table. 
She claimed she could drink me under the table, but we both just had a couple of beers.
Pro Tip 2/3Competitive Connotation
It implies a challenge or competition involving alcohol consumption. 
During the bachelor party, they tried to drink each other under the table.
Pro Tip 3/3Not For Formal
It's informal and not suitable for professional or formal contexts. 
At the informal gathering, Joe boasted that no one could drink him under the table.