バグる

ばぐる
godan verb
to malfunction; to glitch; to bug out
1. to malfunction; to glitch
For a computer, software, or device to stop working properly or behave unexpectedly.
アプリがバグった。
The app glitched.
パソコンがバグっている。
My computer is malfunctioning.
ゲームがバグって(すす)めなくなった。
The game glitched and I can't progress.
2. to go haywire; to act strangely
For a person to act erratically or for a situation to become chaotic (figurative usage).
(あたま)がバグった。
My brain went haywire.
睡眠(すいみん)不足(ぶそく)でバグっている。
I'm acting weird from lack of sleep.
(つか)れすぎて思考(しこう)がバグっている。
I'm so tired my thinking has gone haywire.

バグる is derived from the English word "bug" (as in software bug). It's a verb formed by adding る to the loanword.

REGISTER:
This is casual/colloquial language commonly used when talking about technology or figuratively about oneself. In formal contexts, use 不具合(ふぐあい)()きる or 誤作動(ごさどう)する.

COMMON PATTERNS:

  • ~がバグる: something malfunctions
  • バグっている: to be malfunctioning (state)

ASPECT ({ている}):
バグっている indicates an ongoing state of malfunction.