dadult

A young-ish male between 18 and 30 who feigns maturity by adopting the demeanour, sense of humour, dress sense, tired attitudes and the general guise of their father or a generic "dad". Usually done as a result of never having been very interesting in the first place

Mark is a fucking boring dadult who buys Blue Harbour, drinks ale, and has a receding hairline of a 40 year old