The act of when a young boy, that is currently in a
relationship, travels to foreign lands and get laid with some foreign pussy.
This usually happens when there is an ongoing
relationship and one
partner travels, typically the male. This couple is then involved in limited communication and conversation resulting in a natural breakdown. This is due to the partner 'Londoning' without his significant other's consent which will eventually lead to breakup but pure satisfaction for the 'Londoner.'
Oh, look there's John. He just broke up with
Margot since he Londoned without her
consent.
I feel bad for
Scarlett. I heard that her boyfriend was Londoning on her.