Dr Christian Jessen
Dr Christian Jessen is in hot water with Channel 4 bossesGetty

TV's Dr Christian Jessen has denied being a habitual drug user after allegedly offering a stranger a drug-fueled romp on gay dating app Grindr.

The Embarrassing Bodies host made headlines over the weekend when a string of messages showing the 38-year-old boasting about being in possession of Class B drug mephedrone, the "date-rape" drug GHB and cannabis emerged online.

In one of the messages obtained by the Daily Star, Jessen told the man: "It's prob better to meet at my place to be honest. So we can party more and I have everything we need here"

When the man, known only as James, revealed that he was going to pick up some methadone for £80 a gram, Jessen allegedly replied: "No!! It should be 15 to 20 per gram. Not 80!! Don't get it."

Before added that he has his own stash, writing: "OK listen: I have some here that I know is good. So you don't need to get any."

The presenter is said to have also sent images showing off his bulging biceps and his manhood wearing nothing but underwear.

But Jessen has insisted that he was simply "time-wasting" and trying to impress the man when invited him to his South London flat.

"On these chat sites there is a lot of timewasting and chat and silliness that never leads anywhere," he told the Daily Mirror. "My partner and I will do it on a bored evening and have conversations with no intention of meeting up. It is a bit embarrassing now thinking about it, but you quite often chat to random people.

"It is more an ego thing than anything else, could I get them or not. There is always talk of drugs, in London it is such a problem.

He continued: "This chap brought it up. I spend my life advising people on drugs so, of course, I know all about it. I think he said he was going to buy some for 'x' amount and I said don't do that you will be ripped off. Anyone in the know would do that frankly.

"I've been stupid but absolutely nothing happened. There was no meeting and no drugs were taken. That is the key point. It was just horny talk really."

While Channel 4 has yet to release a statement on the claims, Jessen says he expects a dressing down from later this week.

"I've preached about the effects of drugs in the past and I certainly wouldn't want to give the wrong impression," he added. "It's been very embarrassing having these messages printed in a paper. It went too far and I feel very silly for doing it."