The slang term or name for someone who submits to their partner by way of worshiping their armpits.
A pit pet refers to the submissive role, and as such the dominant partner may lead the interaction by way of play-force or request.
A pit pet will often find arousal either in the mere act of submission, or an armpit fetish may come into play.
Mary is my little pit pet. Every time I raise my arms, she blushes. Like a good pit pet, I’ll pull her nose into it and she just moans and trembles.