throw yourself at someone
US /θroʊ jərˈself æt ˈsʌmˌwʌn/
UK /θroʊ jərˈself æt ˈsʌmˌwʌn/

1.
to make it very obvious that you are sexually attracted to someone
:
•
She was practically throwing herself at him all night.
•
He felt uncomfortable when she started to throw herself at him.