crêper

Crêper means to backcomb hair, teasing it against the direction of growth to add volume at the roots — a styling technique, distinct from the related noun crêpe (pancake), which comes from the same root idea of a crimped, textured surface.

• La coiffeuse a crêpé ses cheveux pour lui donner du volume. — The hairdresser backcombed her hair to give it volume.
• Elle se crêpe les cheveux avant les grandes occasions. — She backcombs her hair before big occasions.
• Crêper les racines aide à tenir une coiffure haute. — Backcombing the roots helps hold an updo in place.

Crêper the hairstyling verb has nothing to do with crêpe the pancake in everyday use — the connection is only etymological (both come from a root meaning 'crimped' or 'curled'), so a learner shouldn't expect any cooking-related meaning here.

• expression Se crêper le chignon — A well-known idiom meaning to have a catfight (typically between women) — literally 'to backcomb each other's buns,' from the hairstyling meaning of crêper.