Difficult

[marval]

Things that are difficult to say when you're drunk

Indubitably
Innovative
Preliminary
Proliferation
Cinnamon

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

Specificity
British Constitution
Passive-aggressive disorder
Loquacious Transubstantiate

Things that are downright impossible to say when you're drunk

Thanks, but I don't want to have sex
Nope, no more booze for me
Sorry, but you're not really my type
Good evening officer, isn't it lovely out tonight

[bigfoot3000]

Lol, Jesus I couldn't say most of those words when I'm sober!

[marval]

Nor me I think

[piggynose]

..lous