To exchange political favours.
To combine legislative items, either or both of which might fail on its own, into a single bill that is more likely to pass.
Republicans defeated Democratic efforts to logroll hate crimes legislation into the defense appropriations bill.
To roll a log in a body of water, while balancing on it; to birl.
To move like rolling logs.
To safely move (a body) in an emergency (medical) situation, tilting them up, then laying them on a transport surface.
The rolling of logs from one place to another; an occasion when people meet to help each other roll logs.
(US politics) A concerted effort to push forward mutually advantageous legislative agendas by combining two items, either or both of which might fail on its own, into a single bill that is more likely to pass.
Mutual recommendation of friends' or colleagues' services or products, such as book recommendations in literary reviews.