说一套，做一套

说一套，做一套

Literally means:

say one thing and do another

Actually means:

It means saying one thing while doing another. It figuratively means what one says or promises is a far cry or even completely different from what one actually does. Often used to criticize someone for behaving in a double-faced way or failing to fulfill one's sweet and sound promises or doing things that are quite contrary to what one says. Derogatory.

说的是一个样子，做的是另外一个样子。形容口头上所说的或答应的事情，和实际上所做的差距很大，甚至完全两样。常用来批评某人言行不一，或耍两面派，为了敷衍、应付或欺骗，口头上说得很好听，表示要做某事或要把事情做好，实际上并没有做，或没有好好去做，或所做的和所说完全相反。具有贬义色彩。