anticipatory
adj. the state of being deeply impatient and/or excited about something one expects to occur in the near or semi-near future. Used commonly with an event whose outcome is currently ambiguous. Essentially an adjective form of the word anticipate.
"Prom's coming in only a few short weeks; I'm so anticipatory!"
Holiday Anticipatory Angst
Your desire to see your family at the annual gathering is offset by your anticipatory angst of being judged by your family though your own inner critic judges you mercilessly.
Holiday Anticipatory Angst includes a wide range of stress regardless of one's personal happiness or not so happiness in their own life situation. An example could be when you are pleased with yourself for making a decision regarding a difficult situation, yet have so much angst about revealing your choices at a large family gathering that you have thoughts of skipping the entire event.
anticipatory boner
Popping wood when thinking about an impending occasion where you're guaranteed to get ass. It can range anywhere from a semi to a full on rager, often depending on how hot the girl is and how close you are to go time.
I got an anticipatory boner when thinking about how I'm going to smash that girl on Saturday night.
Anticipatory Drunk
The attitude one portrays before the consumption if alcohol which includes a crazy, drunk, inebriated behavior.
She is totally acting crazy. She must be anticipatory drunk