(informal, idiomatic) Someone who is easily fooled, victimized, or ridiculed. / (informal, idiomatic) Someone who is eccentric, nonconformist, or otherwise peculiar.

(management) Describing a service operation at which all of a customer's needs may be satisfied by a single server, without waiting in a second queue.

(idiomatic) According to one's understanding.

In the time when one was of a certain age.

Alternative spelling of plus one

A friend or date whom one brings along to an event; a guest of a guest.

According to one's subjectively formed thoughts, not necessarily having any formal basis in fact.

(colloquial) Something important; (with 'the') the most important one, (especially sports) the big game, the big play. / (US, colloquial) One hundred or one thousand dollars. / (US, colloquial) A dollar.

(idiomatic, derogatory) Subject to one's demands because of bribery.

In a single session; finishing a task in the same period when one sets out to do so.