Nigdar

Nigger + radar. Your natural instincts alerting you of the presence, of a violent and unpredictable subspecies, just like they did in hunter and gatherer times.

Can also be used to notice and point out involvement of niggers in something, such as a thrased place, crime scene, or mudshark making your nigdar go off.

"I thought that blonde was cute til my nigdar went off and I noticed the black mulatto fuzz in the back seat, indicating that she's let herself be ravashed by a savage mandingo earlier in her life."