A version of the Tramp Stamp
tattoo, often a "tribal" design (ironically, worn mostly by white suburban club girls) positioned at the center of the lower back just above the "hipster" panty line, usually forming an "ass arrow" pointing toward the butthole and graphically implying the woman desires anal sex
and will rejoice when you follow the sign and enter through the backdoor.
"Her Ass Antlers were so hot, and so was the faux protest and squeal when I followed instructions and buried my fresh breadstick deep in her hot chocolate fondue."
"With my crazy anal fetish, one look at her ass antlers and I knew she was the girl for me"