"What was John Adams the first to be in the White House?"
Thin inn is the hink pink for skinny hotel.
The hink pink for "boy's test" is "lad's quiz."
"Man pan" is a hink pink for male pot or masculine skillet.
Dark ark is a Hink-Pink for Noah's boat with the lights off.
lathering gathering is the hink pink for a group of men shaving
pink mink
The hink pink is clean teen.
"Ground mound" is the hink-pink for "dirt heap."
hot pothot pothot pot
think pink
If it were a Hink-Pink, it could be "a thick brick." Actually, the question is about Hink-Pink according to the original source for the question which is a book for gifted students. The section of the book asks about both hink pink and hinky pinky, and the question is in the hink-pink category on the page.