Verb has 1 sense

• plunk down(v = verb.contact) flump, plank, plonk, plop, plump, plump down, plunk - set (something or oneself) down with or as if with a noise; "He planked himself into the sofa"; "He planked the money on the table"

Sample sentences:
Somebody ----s somebody
Somebody ----s somebody PP
Somebody ----s something
Somebody ----s something PP