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

What? What did you say?

whatchamacallit, X

(informal) Short for ちょっと (chotto).

diminutive suffix indicating a person, intended either endearingly or disparagingly.

(colloquial) Short for 頂戴 (chōdai).

The hiragana syllable ちょ (cho). Its equivalent in katakana is チョ (cho).

(Kagoshima) traditional Japanese clay teapot

what is this?

what