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Abbreviation for "my little face when." It is a play on the popular mfw, except that the reaction faces are generally My Little Pony related.

Reaction faces are generally images, although they can be text-based as well, such as -_- for a poker face. Because text-based faces are not pony-related, mlfw is almost exclusively proceeded with a picture rather than just text.

The name comes from the site of the same name, which is a My Little Pony reaction face site.

Generally, mlfw is used by a brony instead of the regular mfw used by non-bronies.
>mlfw Fluttershy squee'd :'D (link to pony reaction picture)
by sharamall April 30, 2012
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