tocar el dos

Literally, “to touch the back”, from archaic Catalan dos (“back”), to tap the back of a horse or other transport animals to encourage them to move forward.

tocar el dos (first-person singular present toco el dos, first-person singular preterite toquí el dos, past participle tocat el dos); root stress: (Central, Valencian, Balearic) /ɔ/

1. (idiomatic) to leave; to up and leave; to scram

• Because dos is an obsolete spelling of dors (“back”), the literal meaning is sometimes interpreted as "touch the two" by those not aware of the history.