1. The act of sleazily coming on to a member of the opposite sex, often utilising alcohol, ridiculously colourful clothing and eye-watering lines of Austin Powers style calibre, usually delivered in an drawling accent straight-outta Surrey. A Schweffe can be of either sex.
Chap 1: Mate, did you see Georgie schweffing up Charles and the hunt ball last night? He could barely stand straight.
Chap 2: Ya, I tried to get close to ask if he was alright but she kicked me straight in the cock and told me to fuck off.