1. n. Cheap, re-released domestic beer popular during the early to mid 20th century now purchased by younger consumers due its novelty and inexpensive price.
2. Beer that tastes like the first sip of your dad's beer when you were 10.
"Whoa, $12 for a case of Blatz?! Dude, this tastes like piss!"
"Yeah, man. It's dad beer!"