She's acting suspicious, comes right home after getting a phone call.

He was walking around in circles, and acting a little suspicious.

The man described him as "acting suspicious," said the official, who did not elaborate.

However, after a while he begins acting suspicious and she decides it would be best to part ways.

That's when the boys outside will begin to act suspicious.

In the situation they currently found themselves in, it was probably best not to act any more suspicious than absolutely necessary.

All the guy ever does is lurk around and act suspicious.

Meaning: Don't act suspicious if you want to avoid being suspected.

We're supposed to report anybody we see who's acting a little suspicious.

It didn't show up in the dark at all; but this woman with the white hair certainly acted suspicious.