Line of Duty fans were baffled over a certain 'rude' acronym used during tonight's first episode.
Viewers were excited as new character Joanne Davidson made her arrival in the hotly anticipated new series.
During the nail-biting first instalment of the programme, fans quickly noticed a new acronym being mentioned by the characters.
The police officers began discussing 'CHIS' and viewers went into meltdown trying to work out what it meant.
Many noticed it sounded like an innuendo, as one said: "Is it just me, or does 'CHIS' sound rude?"
Another penned: "Lads don’t wanna be rude here but CHIS sounds like something else and I can’t take it seriously".
"So we all learned the meaning of jizz…I mean CHIS this evening", joked a third with two laughing emojis.
Many fans began googling the meaning of CHIS and discovered it stands for 'covert human intelligence source'.
More to follow
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