picarse

infinitive of picar combined with se

(intransitive) to itch (to feel itchy; to feel a need to be scratched)
to sting
to chop
to bite
to mince, to dice
to stab; to wound
(colloquial) to snack; to nibble; to have a bite
to rot; to decay; to eat away; to rust
to pique
to crush (ice)
(intransitive) to sting or be pungent to the lips or tongue, be spicy or, of a candy, very sour
(Mexico, slang) to sexually penetrate, fuck
(reflexive) to get angry, get annoyed, take offence
(reflexive) to turn sour
(Mexico, reflexive) to get addicted, fascinated, enraptured
(intransitive) to bounce