1997 March 26, piranha, “RANT: Things that I hate about being single in the '90s”, in soc.singles.moderated[1] (Usenet):
"safe" as in "doesn't give me the heebie-jeebies" (which might have nothing to do with actual safety, but with my comfort level in zir presence), sure, i do that with every stranger, male or female. and if my weirdar beeps, i remove myself from zir presence.
2000 September 24, No User, “Mouseplanet Improving”, in alt.disney.disneyland[2] (Usenet):
> Uh huh....another nut. Bye. Hello. It takes one to know one. ;-) We have weirdar and you're showing up very clearly, Jon.
2014, Brinda Berry, The Waiting Booth[3], Sweet Biscuit Publishing, →ISBN:
My scalp prickled and my internal weirdar blinked Warning. Warning. Danger. Danger. I squinted because the more I looked—really looked—at him, the more I saw there was something not quite normal about him.
2017, Erin McCarthy, Silence of the Ghost[4], →ISBN:
I really needed to listen to my weirdar. You know, that radar that goes off inside you when someone is a freak?