Cleavage

When possessing Rose Tyler's body, Cassandra O'Brien.Δ17 unbuttoned her shirt and exposed her cleavage in an attempt to make herself appear more desirable. She also took visible pleasure in concealing a sleep-inducing perfume down Rose's décolletage. (TV: New Earth)

Melody Malone's cleavage "could fell an ox at twenty feet", according to Melody Malone: Private Detective in Old New York Town. (TV: The Angels Take Manhattan)