Especially rounded.
Often used to describe
chibi or
super deformed characters, personal electronics, cars or anything that would commonly have hard angles or edges, that is instead curved or rounded.
A combination of the words "bubble" and "lumpy", used by fans of anime, thought to be originally used in reference to the hands of
MewTwo (from Pokémon).
"Woah, is that a Neon Genesis
keyring?
Chibi Shinji looks so blumpy!"
"The new VW Beetle is kind of like the old one, only blumpy."