To spin a dit would be to make a claim about an event which is usually extravagant but you, in your own mind believe is legitimate and such an erratic story will perhaps boost your street cred. Most other people with you will realise the nauseating exaggeration of such a story and tune promptly out.

When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.