For younger people in a relationship, young meaning 18-23. When either your parent(s) or your partner's parent(s) successfully cockblock your chances of getting laid. A wingman is unable to prevent the cockblocking because of the intimate time alone with you and your partner. Phone calls, texts, or interruptions are the most common nuances of a parental cockblock.
For people older than 23, are you seriously dependent on your parents to allow a parental cockblock? Wow, your life sucks!