We found 2 definitions of root on from 2 different sources.
Verb |
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root on - spur on or encourage especially by cheers and shouts; "The crowd cheered the demonstrating strikers" | ||
cheer, inspire, urge, barrack, urge on, exhort, pep up | ||
encourage spur on; "His financial success encouraged him to look for a wife" | ||
cheerlead act as a cheerleader in a sports event |