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Related to swear out: sweat out
1. Of a police officer, to make a written declaration under oath in the presence of an authorized person, especially to use as evidence or in order to obtain a warrant. The disgraced cop admitted to swearing out false affidavits to confound investigations in return for bribes from the notorious crime syndicate. The judge swore out a warrant to search the suspect's home, but it was never served by police.
2. To issue a litany of profane language as a reprimand or attack against someone. In this usage, a noun or pronoun is used between "swear" and "out." He stood there swearing out the driver that nearly backed into his car. The boss swore me out for a good five minutes for messing up the accounts so badly.
Obtain a warrant for arrest by making a charge under oath, as in The school principal swore out a warrant for the arrest of the vandals. [Late 1800s]
To obtain some warrant for arrest by making a charge under oath: The victims swore out a warrant against their attacker.