neckline, cleavage, share of the bill
Él le miraba fijamente al escote.
He stared intently at her cleavage.
Tu escote.
Your neckline.
— Taxi Express (1998)
La rubia tiene realmente un lindo escote.
The blonde really does have a nice cleavage.
Incluso las jovencitas de poco seno, tienen escote.
Even young girls with small breasts have cleavage.