(now rare) To take part in, to be present at (a group, social event, etc.; later especially a criminal undertaking).

plural of bone-on

(informal)

Alternative form of there you have it

Belonging to oneself and to nobody else.

plural of one-pager

A form of billet reading in which the supposedly clairvoyant performer is covertly given information about one of the concealed messages beforehand, and then remains one step ahead while "predicting" the rest of the messages.

plural of lob-on

Synonym of one-worldist

A proponent of one-worldism.