The present participle of frog; either hopping like a frog, or the process of decorating with frog fastenings on clothing.
From 'frog' (verb), adding the present participle suffix '-ing,' used since at least the 18th century in both movement and tailoring contexts.
The same word 'frogging' describes both a amphibian's movement and a tailor's decorative technique—showing how language assigns the same root to completely different activities!
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