What does "earful" mean?

an angry reprimand, castigation or telling off

Earful

Common synonyms include: bawling out, castigation, chewing out, dressing down, dressing-down, going-over.

/ˈɪɹfəl/ noun, slang

noun, slang ·Moderate ·College level

Noun

1
an angry reprimand, castigation or telling off informal
"give someone an earful"
2
a severe scolding wordnet
3
intimate gossip informal
4
an outpouring of gossip wordnet

"If you catch a cold, I'm going to get an earful."

From ear + -ful.