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1. A man who behaves in an overly familiar way and is always replying to the social media messages of a woman he doesn't know or is barely acquainted with.

2. An annoying man who replies to social media messages, in general - whether this annoyance is due to a perceived know-it-all attitude, excessive familiarity, banal arguments that the annoyed user doesn't feel compelled to reply to again and again, or violation of some imagined pecking order.
Mental health improves 120% when reply guys are blocked or muted
by Esther Lolstein December 20, 2018
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2
A guy that replies.
Oh look that reply guy is replying to all the comments.
via giphy
by Nezahualcoyotl December 22, 2018
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