E-man,
If you use the word Anti-American as a noun then that would be an oponent or adversary; possibly a rival, foe, or enemy. So if I said "you are an anti-American." I would mean you are the enemy.
Now if we use anti-American as an adjective , as in "I am hindered by anti-American forces." So then in this sense the anti-American as adjective is adverse to American, antagonistic towards American, impeding American interests, obstructive to American interests, hostile to anything American (including policies or people), or unfriendly towards American interests.
By these definitions terrorists are definabley anti-American as a noun or adjective.
So if you say you are a little bit Anti-American well, that's like being a little bit pregnant. I'd suggest finding another less disagreeable phrase. Something like "I sure do like American people.", or "I sure don't agree with all US gov't foreign policy." Because the foreign policy which kept the UK solvent in the 1980s was something you'd probably like. While going to war to save anyone but Brits asses would be policy you wouldn't agree with, right? I'm just asking.
As we say here in Texas "Them's fightin' words hun."
American Panda