get a load on

Stanley has followed Willy in and sets a chair for him. Stanley starts off but Happy stops him.
Happy: Stanley!
Stanley stands by, waiting for an order.
Biff (going to Willy with guilt, as to an invalid): Sit down, Pop. You want a drink?
Willy: Sure, I don’t mind.
Biff: Let’s get a load on.
Willy: You look worried.
"get a load on" も口語的な表現です。難しい単語は知らないものが沢山ありますが、この様な簡単な単語を組み合わせた口語表現も、主に本を読んで英語を勉強している私としては、同じように知らない表現がいっぱいあって困るのです。　しかたがないので辞書を見ます。
・McGraw-Hill Dictionary of American Idioms and Phrasal Verbs: Sl. to be intoxicated. Fred has a load on and is finished drinking for the evening. You have a load on every time I see you at a party.
・Dictionary.com: Slang . a sufficient amount of liquor drunk to cause intoxication: He's got a load on tonight.
・Urban Dictionary: To get really drunk/hammered/slammed.; It was indeed a good night to get a load on.
"Let’s get a load on" は "Let's drink." と同じ意味ですね。
Death of a Salesmanを読み終わりました。時代背景があるのでしょうが、陰気で悲しい話なので、私は映画や劇で見たいとは思いません。