het uphet up /ˌhet ˈʌp/ adjective [not before noun] British English informal 
Mike tends to get het up about silly things.
WORD ORIGINhet up
Origin:
1800-1900 Old past participle of heatLongman Language Activatorto become upset
· I get upset when I see people being cruel to animals.· At the slightest mention of her ex-husband's name she gets upset.get upset about · It was an awful thing for him to say, but there's no point in getting upset about it.
informal to become very upset or angry, so that you think things are worse than they really are: · I'll tell you what he said, but promise you won't get worked up.get worked up about/over: · It's not worth getting worked up about. Anyone can make a mistake.get (yourself) all worked up: · If there's nothing you can do, why get yourself all worked up, honey?
to be more upset by what someone says than they intended you to be: · Don't take anything he said to heart - he was drunk.· Brian is a very sensitive kind of person and he takes criticism very much to heart.
especially British, informal to become very upset about something in a way that other people think is unnecessary: · There's no need to get so het up - it's only a driving test!
COLLOCATIONS FROM THE ENTRY Mike tends to get het up about silly things.
anxious, upset, or slightly angryhet up about/over Mike tends to get het up about silly things. Mike tends to get het up about silly things.