Generally, gender-rape implies some sort of allegation of sexual impropriety or sexual prejudice on the part of the accused, when in fact the accused is generally innocent. Therefore, gender-rape is a means of sexual prejudice, more frequently used by females against males, but not always so. Akin to reverse-sexual-discrimination but on a more passive-aggressive level, usually with ulterior motive.
Used as early as the mid 1980's by Robert W. Schellhaas, Phd MDiv
2) An effeminate gay male or a male-transgendered falsely accuses a heterosexual male of prejudice, based upon the former's more female-gender identity-- generally either in a passive-aggressive parlay of getting-even, or in a power-play.