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1.
The act of fapping in public to a total stranger, or fapping to a picture of a hot friend or acquaintance.
The other day i walked in on my roomate quagmiring a pic of alice on facebook, was awkward as hell.
by xFlea September 23, 2012
 
2.
Is when you fap to someones picture that you like.
She caught me quagmiring to a picture of her, and broke up with me
by Nadz84 September 23, 2012