A sound in one's ears or actually in the brain sometimes made by a disease called Tinnitus. Missed deadlines can make the same sound.
"I love deadlines. I love the whooshing sound they make as they fly by."
Douglas Adams, English novelist
Ooopss, I am late with my tax forms, just heard the deadline whooshing.
The moment that any woman feels their uterus draining like a bath tub (start your period). This flow apparently lasts exactly two days before the "drip-drip" section which lasts exactly five days. This term was first coined by Dr. Avishai Weiss.
Molly stood up and said, "I'm whoosing!"