the.com/giggling
Laughter that escaped before your dignity could file the paperwork.
means Laughing in short, light, often involuntary bursts, usually suppressed and usually failing to be suppressed.
from From Middle English, an imitative word built to sound like the thing itself — the soft, bubbling 'gig-gig' your throat makes when seriousness loses.
ContagiousSpreads through groups faster than the actual joke.
Inappropriate timingFunerals and meetings summon it on purpose.
Word shapeOnomatopoeia — it imitates the sound it names.