The phrase "act irritable" is correct and usable in written English.
You can use it to describe someone behaving in a way that shows annoyance or impatience.
Example: "After a long day at work, he tends to act irritable when he gets home."
Alternatives: "behave grumpily" or "show irritation".
Stopping self-injury may lead your child to act irritable and emotional volatile, or engage in unhealthy replacement behaviors such abusing drugs or food.
By then, a child might start feeling dizzy and listless and begin to act irritable or tired.
Why do we deny that we wanted something and then act irritable and passive aggressive when we don't get it?
In situation evocation, for example, we spark a response from people that reinforces a tendency we already have -- for example, if I act irritable all the time, the people around me are probably going to treat me with less patience and helpfulness, which will, in turn, stoke my irritability.
How many times have we been silently resentful about something but said nothing and then acted irritable to someone else? Usually someone we are comfortable with, like family, because we know they'll love us anyway.
Touch its tail, and see it act, well, irritable.
Dexter hides the envelope and confronts the driver, who acts very irritable.
Don't do this, because it leaves you feeling irritable; act like you have OCD and eventually your body gets so used to the sleep pattern you find it difficult to sleep all the time.
She became ever more frustrated and acted ever more irritable.
If you give out negative energy, your dog can act up and become irritable.
As well as means for being bad at their jobs, the CIA offers instructions to "Act stupid" and "Be as irritable and quarrelsome as possible without getting yourself into trouble".
