what is the meaning of railer?

Answer 1

Quick definitions (rail)
noun: any of numerous widely distributed small wading birds of the family Rallidae having short wings and very long toes for running on soft mud
noun: a horizontal bar (usually of wood)
noun: short for railway (Example: "He traveled by rail")
noun: a barrier consisting of a horizontal bar and supports
noun: a bar or bars of rolled steel making a track along which vehicles can roll
verb: provide with rails (Example: "The yard was railed")
verb: enclose with rails (Example: "Rail in the old graves")
verb: complain bitterly
verb: fish with a hand-line over the rails of a boat (Example: "They are railing for fresh fish")
verb: lay with rails (Example: "Hundreds of miles were railed out here")
verb: convey (goods etc.) by rails (Example: "Fresh fruit are railed from Italy to Belgium")
verb: separate with a railing (Example: "Rail off the crowds from the Presidential palace")
verb: criticize severely (Example: "She railed against the bad social policies")
verb: travel by rail or train (Example: "They railed from Rome to Venice")
verb: spread negative information about
name: A surname (very rare: popularity rank in the U.S.: #34929

Answer 2

One who expresses objections or criticisms in bitter, harsh, or abusive language.

A person who is constantly scolding, often with loud and abusive speech.

Of course, it could be slang for something totally different.