When you and another person are squished together so that your boob is against their armpit, or vice versa. Typically used when standing in a crowded place, like the student section at a football game.
When a chick's tits disappear into her pits when she lays down without a bra. They look real goodand then she takes off her bra and they just disappear into her pits.
Her doubles D's disappeared when she took off her bra. What a disappointment. Fuck those are some major pit-tits.
That chick has major pit-tits. When she lays down, they disappear into her pits.
Fat or flesh that can't be classified as back fat or actual breast tissue that hangs under the arms. They are the counterpart to Bingo Wings, the excess fat or sagging skin
on the upper arms. When not compressed by the bra of a band or other "foundation garment", excessive pit tits can prevent the owner from drawing their arms to their ides, giving them a sumo wrestler stance.
I wish it were possible to moosh my pit tits into the cups of my bra. Maybe then, I wouldn't need a wonderbra just to look proportionate.