get behind

1

See fall behind.

2

Support someone or something; also, help to promote someone or something. For example, We must find as many workers as we can to get behind the union.

3

Enjoy, appreciate, as in Norma just can't get behind ballet. [Slang; c. 1970]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.