Definitions

1. interjection

a sound of disappointment or frustration, typically a sudden exhalation of air

“She let out a loud blup when she saw the broken vase.”

2. verb

to make such a sound, to exhale air suddenly

“The child bluped in frustration when he couldn’t reach the high shelf.”

3. noun

a sudden exhalation of air, typically expressing disappointment or frustration

“The blup echoed through the empty hallway.”