One who receives a gift from someone, does not like it, so he/she gives to someone else for his/her birthday christmas etc.
Elain accused George of being a re-gifter after she found out that George had given the gift to his girlfriend for her birthday.
The time in between having to sneeze, and actaully sneezing. Usually characterized by holding one's head up and looking up towards the sky/ ceiling and unintentionally making a funny face, due to the upcoming sneeze.
Nick was not able to answer the question in time because he was going through intersneviation.