to become very serious or grave
human a; "i'm feeling like the whole world is ending right now and we are all dying"
human b: "don't get all skull and crossbones on me"
by curtainrod September 18, 2008
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1) Three Xs and a skull and crossbones — the description of a person, event, timing, or situation that is absolute toxic. This can be spoken or typed as the following emoji: “XXX☠️”

2) Maaaaaaaaaaaaaaaan, you can date her / him if you want to. She’s / he’s hard on a lover — three X’s and a skull and crossbones. You’ll be lucky if you escape with your nuts / uterus!!!!!!!!
Letting an Amazon warehouse into your community is three Xs and a skull and crossbones for local small businesses. The work conditions are oppressive and after they are established themselves and their market; they replace as many workers as possible with automation.
by Mind Hunter the Profiler February 23, 2023
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