on (one's) side

Supportive or in aid of one or one's idea, plan, intention, etc. We're all on your side, Jerry. We just want to see this issue resolved as quickly and easily as possible. If she's going to win this case, she'll need one heck of a legal team on her side.

on side

supporting or part of the same team as someone else.

1997 Spectator And while clearly ‘on side’ with New Labour, he has never been a closely quartered insider.

See also: on, side

Farlex Partner Idioms Dictionary © Farlex 2017

See also:

be on (one's) side
be on somebody's side
on (one's) side
on someone's side
on your side
stand by (one's) woman
stand by (one's) man
a man cannot serve two masters
(one's) (true) stripes
(one's) true color(s)

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