I grabbed onto; I caughtWith a la or a noun, it means “I grabbed onto” or “I held onto” something. With an illness such as un resfriado or una gripe, it means “I caught” it. It is the first-person singular past tense of agarrarse or agarrar.
SP: Me agarré al pasamanos cuando el autobús frenó.
EN: I grabbed onto the handrail when the bus braked.