A parent that is high strung, obsessive and over protective. A do-gooder and know it all.
Sheila, the PTA president is such a house parent.
Someone who usually goes drinking at The Griffin inn or, if you're having a quiet one, The coach and horses. One whose anatomy is made up of 80% wine, 10% tory and the last 10% is either more alcohol or fags depending on how many years of school fees they have left to pay.
person 1: maybe we should open one more bottle?
person 2: yehhhhh why not, let's not turn into Cumnor House parents though, we've already got through 5.