logrolling

Short definition from Wiktionary

Noun

1. 1
   The rolling of logs from one place to another; an occasion when people meet to help each other roll logs.
2. 2
   The rolling of logs from one place to another; an occasion when people meet to help each other roll logs: The act of balancing on a log floating on a river to guide it downstream, often involving rolling it using one's feet; birling.
3. 3
   The rolling of logs from one place to another; an occasion when people meet to help each other roll logs: 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.
4. 4
   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.
5. 5
   Mutual recommendation of friends' or colleagues' services or products, such as book recommendations in literary reviews.

Verb

1. 1
   present participle and gerund of logroll.