When you used to go hard as a mother fucker but now you’re a Dad so you can only go hard as a mother fucker ish. On occasion. This is Dad Ham.
Dad Ham Variant: When a Dad who used to go hard as a mother fucker has one of his couple times a year turn ups and forgets how to turn up well and goes Dad Ham.
Fark did you see Jono at his party, he went full Dad Ham.