yes, and no. In English any noun can be used as a verb. For example, microwave is a noun but we understand the meaning when it is used as a verb. Same with wetback. It is a noun but when used as a verb in normal sentence structure we automatically understand the connotation.

I guess it depends on how the word is used. I've never heard it used as a verb. Interestingly enough, the term itself came into prominence in the 1950s when Operation Wetback went into effect. Operation Wetback was a 1954 project of the United States Immigration and Naturalization Service (INS) to remove about four million illegal immigrants from the southwestern United States, with a focus on Mexican nationals. The operation began in California and Arizona and coordinated 1,075 Border Patrol agents along with state and local police agencies to mount an aggressive crackdown. 750 agents targeted agricultural areas with a goal of 1000 apprehensions a day. By the end of July, over 50,000 aliens were caught in the two states. Around 488,000 people fled the country for fear of being apprehended. By September, 80,000 had been taken into custody in Texas, and the INS estimates that 500,000-700,000 people had left Texas voluntarily. To discourage re-entry, buses and trains took many people deep within Mexico before being set free. Tens of thousands more were put aboard two hired ships, the Emancipation and the Mercurio. The ships ferried them from Port Isabel, Texas, to Veracruz, Mexico, more than 500 miles (800 kilometers) south. Some went as far as 1,000 miles.

I have never heard it used as a verb, only as a noun or adjective and I always find it offensive.

I prefer the term "Snowback" as I find vacationing Canadians far more offensive and obnoxious during season than I ever would Mexicans for actually working here and contributing something.

lol yeah ive heard it. and I've probubly used it many times before, I always crack jokes bout mexicans partially because im part mexican(but don't look it)so people don't really find it offensive.

No, I've heard it used as an adjective and a noun. Interestingly enough, it comes from 1954 when "Operation Wetback", a program of US immigration and naturalization went into effect under President Eisenhower. This was a very successful program that deported illegal immigrants from the US and slowed the illegal entries to a trickle. Illegal aliens were rounded up, loaded on buses and taken deep into Mexico before they were released. Tens of thousands more were put aboard two hired ships, the Emancipation and the Mercurio. The ships ferried them from Port Isabel, Texas, to Veracruz, Mexico.

no, and never used it...nor will plan too

It doesn't matter what part of speech it is or how it is used, it's a racial slurr. I find it offensive. I've never heard it used in an upliftinf way or applied as a postive trait. Usually when used it is degrading someone. Any word that points out a race and degrades someone is not okay.