The difference between Act up and Carry on
When used as verbs, act up means to misbehave, whereas carry on means to continue or proceed as before.
check bellow for the other definitions of Act up and Carry on
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Act up as a verb (intransitive, idiomatic):
To misbehave; to cause trouble.
Examples:
"My allergies act up during hay fever season."
"Children may act up in class in an effort to get attention."
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Act up as a verb (intransitive, idiomatic):
To perform the duties of an appointment senior to that actually held; to deputise for a superior.
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Carry on as a verb (idiomatic):
To continue or proceed as before.
Examples:
"I'll be gone for a few days, but I hope you will carry on in my absence."
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Carry on as a verb:
To take baggage or luggage onto an airplane, rather than check it.
Examples:
"You may only carry on items that are smaller than a certain size."
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Carry on as a verb (idiomatic):
To have or maintain.
Examples:
"It is difficult to carry on a conversation with so many distractions."
"to carry on commerce in a market"
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Carry on as a verb (idiomatic):
To act or behave; especially to misbehave so as to attract attention.
Examples:
"I really wish you wouldn't carry on like that in public!"
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Carry on as a verb (idiomatic):
To have an illicit sexual relationship.
Examples:
"I thought he was my friend, but all the time he was carrying on with my wife!"