Nickname given to Americans living in places without many Spanish-speakers or Starbucks, meaning the native people using the term don't understand it's not really all that funny.
i.e. Australia
When you dump a water bottle in a vagina slit your cock then cum inside of the same vagina is know as an Americano. Was derived when emo music became popular.
Mike I heard you americanoed that girl you brought home from the bar last night. Yeah she asked if I was emo so I showed her my cock.
An espresso shot diluted with hot water, which tastes like thin airline coffee, but which saves a barista the time and bother of making a rich, brewed coffee by doing a pour-over with ground coffee and near-boiling water. An Americano made with more shots of espresso is a type of intelligence test: it tastes richer, like real brewed coffee, but you're paying twice as much.
Customer: How's about an Americano with two shots of espresso?
Barista: Two-shot Americano for the moron!