Someone who enjoys doggy-style being so hard they have to bite the pillow to muffle their screams/moans.
Example 1
Joe: So, what was she like last night?
Bob: She's a total pillow-biter, dude!
Example 2 (insult)
You pillow-biter!!
Joe: So, what was she like last night?
Bob: She's a total pillow-biter, dude!
Example 2 (insult)
You pillow-biter!!
by anyapiratepixy May 06, 2010