From the emoticon, named for its originator (MonkaSenpai) and "scared".
monkaS
- (Internet slang, Twitch-speak) An expression of fear or dread.
2023 December 6, @d00mwake, Twitter[1]:2 days after the ban announcement monkaS
2020 November 10, @risteband, Twitter[2]:Wait Seeker's Armguard is getting buffed? monkaS
2018 August 21, @igumdrop, Tumblr[3]:OKAY SORRY, went a little monkaS there, but i’m perfectly fine now and i’ve figured out what i need to do!