(Also, I have no idea what "tokachitzukushi" means)
More than likely, referencing the way the twins mispronounce lyrics, most reputably in "Agent Yoru no Yuko"
Wrong!!!Oh, right! Sabetsu!IdolMaster Same-Character Conversation, #2What-!? We haven't shown up yet?That's right! It's gotta be discrimination (sabetsu)!It's round- And green-Um...A melon?It's a cabbage (kyabetsu)♡Ah♡ Now I get it-♪Ah ha ha ha ha ha haGuys...Be more serious!