The N-Dubz star was hauled into the Diary Room and spoken to following a conversation with fellow housemate Jasmine Waltz.
According to the Daily Star, Jasmine had crassly asked if Dappy had ever pleasured himself orally, to which he replied: "Do I look bent?"
Big Brother called Dappy to the Diary Room and reprimanded him for using the word, saying that it could cause offence.
The newspaper states that this is the third time Dappy has been spoken to about his choice of language.
A CBB spokesperson told Reveal: "Dappy was reprimanded and producers will keep an eye for repeats."
Dappy is the second housemate this year to be reprimanded by Big Brother - even though this series only kicked off on Friday (3 January).
Former boxer Evander Holyfield was warned about his behaviour after telling Luisa Zissman that being gay was "not normal", claiming it could be "fixed".
Celebrity Big Brother 2014: The full lineup
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