1 to behave or think in a strange way, especially because of being very worried, frightened, or angry:
2 to leave a place or situation quickly, especially because of danger:
I looked at myself in the mirror and saw my hair was all wiry, my skin was all wrinkled and pasty, my eyes were bloodshot and bugging out.
In early films, zombies were hypnotized people with eyes bugging out.
The machines frequently crash, bug out, or just do weird stuff.
You can bug out now. There's no reason to stick around--just leave!
The treaty is voluntary. Any nation can bug out at any time.