- act up, carry on - misbehave badly; act in a silly or improper way; "The children acted up when they were not bored"
--1 is one way to misbehave, misconduct, misdemean
Sample sentence:
Somebody ----s
- act up - make itself felt as a recurring pain; "My arthritis is acting up again"
--2 is one way to ache, smart, hurt
Sample sentences:
Something ----s
Somebody's (body part) ----s