What is Pantsu?
1.
The japanese word for "panties" (panties in a japanese accent) that since Chii from the series Chobits (CLAMP) has said, has spiraled into another form of slang for wannabe-asian otakus. Other examples of these incidents are phrases like "kawaii desu" and "konnichiwa."
"Chii wears pantsu!"
"I am such a cute anime girl nya I wears me some pantsu!"
2.
Just another word for panties.
Wow, he has a complete and total fetish over pantsu.
3.
Japanese for "Briefs" and/or "Male Underwear"
"Pantsu! Pantsu! Pantsu!"