floss
noun
[ flɒs ]
• the rough silk enveloping a silkworm's cocoon.
• short for dental floss.
floss
verb
• clean between (one's teeth) with dental floss.
• behave in a flamboyant manner; show off.
Origin:
mid 18th century: from French (soie) floche ‘floss (silk)’, from Old French flosche ‘down, nap of velvet’, of unknown origin.