tee ‧ ny ‧ bop ‧ per /ˈtiːniˌbɒpə $ -ˌbɑːpər/ BrE AmE noun [countable]
[ Date: 1900-2000 ; Origin: teen + -y + bopper (from ⇨ ↑ bop 1 ) ]
old-fashioned a girl between the ages of about 9 and 14, who is very interested in popular music, teenage fashions etc