high sign

You keep yer eyes peeled till I git back, and giv'm the high sign, d'yer hear?

His high sign to her was peremptory and unmistakable—Mr. Crowley had business with her!

Why doesn't some gay little lady just looking for a good time give us the high sign, the way they do in books.

I shake hands with the night watchman when he comes on duty and I'm here to give the milkman the high sign in the morning.

And when you're ready to have me operate—fifty-fifty—give me the high sign.