"wienie" means: An informal North American term primarily for a wiener sausage — a hot dog or frankfurter. Also used as a casual, juvenile term for the peni.... The term has a sexual reference, so parents may want to know the context in which a child uses or hears it. In most cases it is part of normal teenage curiosity rather than a concrete worry. A short, non-judgemental conversation about consent, respect and online safety is usually the best response. Look at the wider pattern of behaviour, not the one word.