You are correct! But it means two things. 1. Go for it, sure, go ahead. 2. Polite way to say 'shit' when we are disappointed.(like when we answer a question incorrectly) Can I ask you a question? Shoot!(yes) What is the capital of England? Bristol? No. it's London. Oh shoot!(Oh shit!)

no i don't think so. i think a good response to a question like "Can I ask you a question?" besides "You just did." is "Shoot." ;) so in response to such question, it means: " sure" , " yes , you can"