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2.
A word used to annoy others, in times where surrounding area is quiet.

Simply go HMMPH, to successfully disturb those near to you.
(Silence in Exam room)

"HMMPH!", cries Tom.

The room turns to a state of hysteria, Whilst Tom sits laughing to himself.
by Avocado's! February 09, 2009
 
1.
A sound one makes when frustrated or pouting.
"Hmmph", she said, when she realized she had a ton of homework to do.
by Gator November 24, 2003