The brazen couple indulged in the late night romp on the top deck of a double decker bus.
Passengers looked on in shock and embarrassment as the half-naked woman bounced up and down on her lover's lap with her breasts exposed.
Witnesses say the shameless pair boarded the No. 149 service n Shoreditch, East London, around 2am on Thursday.
Their performance continued to Stoke Newington and through Stamford Hill, North London.
One traveller, 27, said the man was laughing and gesticulating to other people.
He said: "A few people were looking at them but he was laughing and saluting everyone while she was making noises.
"When they got on they were already all over each other. I guess he couldn't wait until he got home - maybe he still lives with his mum."
The 'tipsy' couple, who are believed to be in their mid-20s, were ordered off the bus in Harringay - but received a round of applause from onlookers.
The witness, from East London, added: "People around them weren't really saying anything - that's what was funny. Everyone was being polite."
