act up = 1. to misbehave.
2. to malfunction.
3. Informal. to become active or troublesome after a period of quiescence: My left knee acts up in damp weather. Her arthritis is acting up again.
blow up = 1. to come into being: A storm blew up.
2. to fill with air; inflate: blow up a tire.
3. to enlarge (a photographic image or print).
4. to explode: bombs blowing up.
5. to lose one's temper.…
