He spitballed that he knew all about it.
他信口说道,他知道一切。
Don't believe him. He's spitballing.
别听他的,他只不过说说而已。
英汉双解词典包含483723条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。