godan verb (-ru), intransitive verb
become strained; become awkward; go sour
Internet slang derived from ギスギス, describing a relationship or atmosphere that becomes tense, unfriendly, or discordant. Often used for friendships, romantic relationships, or online communities.
See also: ギスギス
最近、あの二人の関係がギスってるみたい。
Lately, it seems like those two's relationship has become strained.
The atmosphere in the club has gotten awkward, so it's hard to go.