A dad that is divorced from your mum and doesnt live with you/doesn't see you much or has done something bad in the past which means he tries to make it up to you excessively with being nice- giving lifts, buying things, giving money.
The child usually plays this to their advantage.
'Is your Dad really willing to take us all that way and pick us up at 3 in the morning?'
'yeh, guilty Dad'
'Can you get us a lift?'
'Yeh i'm at my dads this weekend so can. Guilty dad init'
'WOW! You've got the new iPhone?!'
'yep, guilty dad'