snap to it（尤用于催促）加把劲、赶快、开始干吧

【例句】
Snap to it, you men, we haven't got time to waste.
赶快开始干吧，伙计们，不然，我们的时间就不够了。

Now put on a smile and snap to it, will you?
给点笑脸，开始干活，行吗？