Originally Posted by
Yaatri
... I was born and raised in India too. Lemon juice and lemonade have always been two distinct things to me. Only one of them is a beverage.
It appears to be a common term among those who do not know the distinction, but want to make fun of others.
Mr. Evangelist, before you criticise others (yaani, OP) perhaps you ought to know that a popular, packaged drink maker in India markets a tetrapak brand beverage called "Lemon Juice", which is often distributed in flight. Hence, it may not have been the case of the OP not being able to distinguish Lemon Juice from Lemonade, but simply referring to the drink by its brand name.