口>突然而沉重地坠下，快速而坚决地放下；

1. 突然而沉重地坠下;快速而坚决地放下：45plug in插入,插上插头(以接通电源) | 46plump down突然而沉重地坠下;快速而坚决地放下 | 47plump up鼓起,变丰满

1. set (something or oneself) down with or as if with a noise

    e.g. He planked the money on the table
           He planked himself into the sofa

    Synonym: plankflumpplonkplopplunkplunk downplump

2. drop heavily

    Synonym: plonk downplank down