2. a criminal.
3. an individual criminally pretending to be a citizen of a nation for economic gain and/or political subterfuge in said nation, and lacks loyalty to said nation.
4. a selfish and/or cowardly person unwilling to positively change the socio-economic and political problems in his/her own country in order to benefit everyone, including him/herself, and thus runs away to another country to hide.
5. a loser.
Illegal aliens (illegal immigrants) often try to proclaim they have civil rights equal to the citizens, of the nation they have trespassed. They do not have civil rights outside of their respective countries of origin except by international treaties.
Illegal immigrants (illegal aliens) proclaim they pay income taxes to the government. They cannot do so as they do not have legitimate tax payer ids with which to do so. The tax payer ids illegal immigrants (illegal aliens) use are stolen - e.g. identity theft.
2) Someone who takes your job, then claims they are doing a job that Americans don't want to do.
3) Someone who sneaks into the country just before giving birth, so their baby can be an American citizen.
"Oh duhhhhh - WELCOME - come on in - duhhhh!!!"
Person 2: Tell him to get a green card, and learn English, then he can be here. He's an illegal alien.