He and his friends often fuddle around at the bar on weekends.

fuddle 原意是"使迷糊、使困惑"，around 表示"四处、到处"。 fuddle around 是一个短语动词，字面意思是"迷迷糊糊地四处转悠"，引申为"无所事事地闲混、消磨时间"。