enter

(adverbial particle, dismissive, derogatory) emphasizes disgust, contempt, or otherwise negative feelings of the speaker: whatever

a box: a container with a lid / (archaic) a chamber pot for feces; (by extension) feces

to go in; to come in / 要る: to be necessary, to be required

to enter, go into, get into a place or a thing / to join a group or organization / to be contained (in), to be included (in) / to be a member of a group, set, category

What? What did you say?

whatchamacallit, X

box

what

What?, Huh?