sauvette

/so.vɛt/
1.
nounfeminine

illegal street vending; sale of goods in public without a permit

La sauvette est très présente autour des sites touristiques.

Illegal street vending is very common around tourist sites.

2.
adverbial phrase

quickly and furtively; on the sly (expressed in the phrase «à la sauvette»)

On est partis à la sauvette pour éviter la foule.

We left quickly and furtively to avoid the crowd.