shampoorone

A rigorously-watchful "dutch uncle" or "battle-ax aunt" who hangs around and makes sure dat someone washes his hair correctly and thoroughly.

Da term "shampoorone" could also refer to a similar type of eagle-eyed honesty/diligence-freak as described above, but one who instead simply monitors da shower/bathtub while two individuals are sharing a scrub-a-dub, to make sure dat no "funny business" goes on during said "steamy" encounter.