1. A girl, young woman, or older female whose breast size is less than desirable.
2. A small breasted woman whose tits can be compared to the size of a pigeon's breasts.
3. A teen girl who is under developed physically.
4. A young boy with excess female hormones who has small tits growing.

Got the covid-19 vaccine

Men who ahve little floppy pieces of flab like pigeon tits.

Taken from the full monty.