All of these idioms can be used in various situations where shyness or social awkwardness is a prominent factor.

Advanced Idioms To Express Shyness and Awkardness

Explanation: Extremely shy or embarrassed, often in social situations.
Example Sentence: She was bashful as a blushing bride when introduced to the large crowd.

Explanation: Feeling awkward and uncomfortable in a new or unfamiliar environment.
Example Sentence: At the party, he felt like a fish out of water among all the strangers.

Explanation: Unable to speak, especially due to nervousness or shyness.
Example Sentence: When she approached her crush, she suddenly became tongue-tied and couldn't say a word.

Explanation: A person who is extremely shy and tends to avoid attention or social interactions.
Example Sentence: Sarah is a real shrinking violet; she rarely speaks up in meetings.

Explanation: To become silent suddenly, often due to shyness or nervousness.
Example Sentence: Whenever she's around new people, she tends to clam up and avoid conversation.