To drink huge amounts of beer or
lager simply to get very, very drunk. Not to
savor the taste or flavor, but just to get wasted. The phrase is used in London and parts of England, usually associated with wide-boy or East-end types, although a trip to
Ibiza might be rewarded with a few examples too.
"
C'mon boys! Let's get
lagered-up! Look at the locals, they're waiting for us to get proper pissed! C'mon boys!
Lagered-up! Lagered-up!
Waaay!"