Things that are difficult to say when you're drunk:

Innovative
Preliminary
Proliferation
Cinnamon

Things that are VERY difficult to say when you're drunk:

Specificity
British constitution
Passive-aggressive disorder
Transubstantiate

Things that are down right IMPOSSIBLE to say when you're drunk:

Thanks, but I don't want to sleep with you
Nope, no more booze for me
Sorry, but you're not really my type
No kebab for me, thank you
Good evening officer, isn't it lovely out tonight?
I'm not interested in fighting you
Oh, I just couldn't, no-one wants to hear me sing
No, I won't make any attempt to dance thanks,I have zero co-ordination
Where is the nearest toilet? I refuse to vomit in the street.

\o/