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Wiktionary
apadravya

n. A male genital piercing where a barbell passes vertically through the head of the penis.

Wikipedia
Apadravya

The apadravya(ap-ah-drav-ya), like the ampallang, is a piercing that passes through the glans. While the ampallang passes horizontally through the glans, the apadravya passes vertically through the glans from top to bottom, almost always placed centrally and passing through the urethra. Off-center apadravyas are also possible, wherein the piercing is deliberately offset, yet usually still passes through the urethra. The piercing is often done on a slightly forward angle to the hips.

Sometimes the apadravya is referred to as happydravya because it is said that having sex with a person who has this piercing is highly pleasurable.