The area on the male genitals where the penis and ball sack make contact when the penis is resting on the balls. Sinilar to how a baby arm is a euphemism for a penis, the baby armpit is a euphemism for the area previously explained.
"I forgot to shower yesterday and now my baby armpit has a gnarly smell"
"Whenever I sweat a lot my baby armpit starts to itch"
"Whenever I sweat a lot my baby armpit starts to itch"
by MartianKazu May 4, 2020