A bubble is a globule of one substance in another, usually gas in a liquid. Due to the Marangoni effect, bubbles may remain intact when they reach the surface of the immersive substance.
Examples
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[sup]Non-exhaustive list[/sup]
- bubble_bath - a recreational or beauty product that covers the surface of bathwater with foamy bubbles, which can also preserve modesty
- cum_bubble - air trapped in cum, suggesting continued sexual contact after ejaculation or a forced exit from an orifice
- foam - a usually whitish mass of many small bubbles, often soap bubbles, sometimes "beer head" or sea foam
- suds - a foamy mix of soap and water
- underwater gases expelled from creatures breathing, man-made structures, and natural geological processes