To err, to be wrong.

(informal, transitive) To pursue with romantic interest, especially in an aggressive, sexually suggestive manner.

To be a crucial factor in determining the success of something.

Alternative form of make a monkey out of

To bid or propose; to initiate a proposal.

(usually with "at") To flirt with (someone) by making obvious glances.

(idiomatic, intransitive) To carry out an action, the result of which is a significant change, or an altered circumstance. / (idiomatic, intransitive) To be of importance; to matter.

(computing) A configuration file that describes the steps involved in building an application from its source code.

(idiomatic) To gamble, either by placing or taking bets. / (idiomatic) To be very confident.

plural of make file