to tie the knot means to get married (english slang)

so jon says that push spice (victoria) asks jon if he is able to bend the shoots like beckham (i think it means if jon is a professional in his job, like beckham is a pro in his job), and jon says maybe im not pro, but im good for getting married and take the girls with me (jon is more professional than beckham at getting girls attentions )

i think it means like this...