Name Ambush:
(noun) When an acquaintance you haven't seen for a long time greets you by name but you don't have time to remember their name.

Joe: "Hi, Andy. How have you been?"

Andy: "Er...Hi. Good. How about YOU?"

Sarah: "Andy, you've just been name ambushed."



P.S.
THIS HAPPENS TO ME ALL THE TIME.

(definition found on Urban Dictionary, or here)
(funny picture of Nicole Kidman found here)

Tongue-Tied Tarantula (noun)

1. Used when one cannot seem to find the words they are looking for.

2. Used when another human being says something that causes others to feel uncomfortable and therefore become tongue-tied because hey do not know what to say.

3. Used just whenever the hell you want to

Stefanie: Shove some bananas down your pants!

Michelle: WHAT?!

Jennifer and Amie: Tongue-Tied Tarantula!

(Definition compliments of www.urbandictionary.com)

(Picture found here)