1 definition by theycallmegav@hotmail.co.uk

Having intercourse with females once or somethings twice and never calling them again
guy 1 - 'Dude, smashed that girl last night!'
guy 2 - 'awesome man was she fit?'
guy 1 - 'yea, super fit!'
guy 2 - 'you going to called her again?'

guy 1 - 'no.'

guy 2 - 'dude you totally did a Smithson on that bitch!'
Get the A Smithson mug.