Pop Tart1
/ˈpɒp tɑːt/originally US
noun
A trademark for: a flat, rectangular pastry with a sweet filling (typically a fruit preserve), intended to be heated in a toaster.
Origin
1960s; earliest use found in The Mansfield News Journal. From pop + tart.
pop tart2
/ˈpɒp tɑːt/noun
A (usually female) pop star regarded as having a sexually provocative image.
Origin
1980s; earliest use found in Life. From pop + tart, punningly after Pop Tart.