EN is an acronym that stands for "Erect Nipples". It is a sensation that can happen to either a man or woman when they are cold or sexually aroused. Often one can spot a bad case of EN from across a room, especially if the person with it also suffers from a case of pancake nipples.
Guy 1: Man, i almost put my eyes out on my girlfriends nips last night
Guy 2: How the hell did that happen?
Guy 1: We were banging on top of the deep freeze and she had a wicked case of EN, i swear they were harder than a diamond in an ice storm!
by Kylav January 20, 2008
En means 'the being'. A being is any entity who has, or has ever had a consciousness. En is used to replace he or she or it or their (singular). En is also used to replace him, her (non-possessive) and them (singular). En is very useful in replacing a character's name when describing them. En is also useful in labelling any person or other being whose gender is unknown or irrelevant. Animals should be referred to as he, she, him, her or en - never 'it'.

The possessive form of En is 'Es'.
1. The child grazed es knee on the ground and en began to cry.

2. The being of light telepathically adjusted the imperfect neurons in es human subject. En was pleased with what en saw.

In the first example, the child probably had a gender. If that gender was known, it would be perfectly reasonable to label the child he, she, him or her. However, in the second example, the being of light had no genitals. Therefore, es gender was irrelevant.

Under no circumstances should the ambiguous terms 'their' or 'them' be used in the singular context again, or 'it' in reference to a non-human being.
by paulnicholson July 16, 2008
Stands for "erect nipples". This is when it is cold outside and a female's nipples become hard and often show through their piece of clothing.
Oh shit! That is a serious case of e.n.
by Wilburg March 23, 2004
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