tête à claques

pain in the neck, blighter (a person so annoying that he or she might deserve to be slapped)

“Ce gamin n'en fait qu'à sa tête, c'est une vraie tête à claques.” — That kid just does as he pleases; he's a real pain in the neck.

Literally, “head for slaps”, i.e. a face that is "asking" to be hit.