The act of balancing on a log floating on a river to guide it downstream, often involving rolling it using one's feet; birling.
Mutual recommendation of friends' or colleagues' services or products, such as book recommendations in literary reviews.
The rolling of logs from one place to another; an occasion when people meet to help each other roll logs.
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.
A sport in which two people balance on a log floating in a body of water, each one aiming to cause the opponent to fall off by rolling or kicking the log.