Slang intensifier used mainly by younger speakers, similar to めっちゃ or 超. Often used in casual conversation.
This ramen is super delicious!
Yesterday's test was extremely difficult.
Katakana spelling is standard for this slang adverb.
Hiragana spelling is also used, especially in casual writing.
The origin is uncertain; it may be a sound-symbolic intensifier or a shortening of a longer expression. It is not derived from standard Japanese ばり (needle/edge).