Sound made when one is attempting to sound reassuring yet non-commital.

Something one says when nothing else can be thought of

1 Phrase used when you are happy.
2 Phrase used when you are bored.
3 Phrase used when you just owned someone.
4 Word when there is nothing else to say.

An especially annoying phrase that a boy will say or text you when you are trying to have an at least semi-meaningful conversation.

1. A term used when deciding.
2. A term used with joy.
3. A singing note.
4. Other uses.
5. Other uses.
6. Other uses

An expression used in response to a questionable comment or statement.

When I don't know how to reply in a conversation or text, I need a filler word to allow time to think of an answer so I say Hmmm. Hmmm is my thinking sound!