on the sly

When they looked at girls it was always on the sly.

It must be done, as I may say, on the sly.

There are a few who encourage him on the sly.

In fact many governments are already doing this as we know - on the sly.

It's not just married women who make purchases on the sly.

The servants did too, of course, but on the sly.

He still took photographs, but now only occasionally and on the sly.

She was charmed by his talk, and began meeting him after school on the sly.

I realized that she had been doing some studying on the sly.

Some says that teachers continue to whack their children on the sly.

"I've taken to switching them out myself on the sly."

Getting an abortion on the sly would be difficult without Cliff's knowledge.

He may even have been humping a bit on the sly himself.

He had better sense, even if I did suspect him of writing poetry on the sly.

Those had been distributed, on the sly, to the others in the squad.

Elsewhere in the neighborhood, some people have gone ahead and added a room on the sly.

It was unlike any other source that had ever provided me with information on the sly.

I spent five weeks taking the kid around on the sly, winning his confidence.

And a lot of things are done on the sly, or through schools with high privacy restrictions.

I nudged Bill and we watched her on the sly.

I've had managers and accountants before who have taken money on the sly.

Let us not switch round the priorities on the sly.

"But does everybody contact your institutional investors on the sly?"

All this, you understand, was done after hours, on the sly, in the practice rooms when the teachers were nowhere to be found.