Any time you have a booger in your nose and you can feel it move back and forth every time you inhale and exhale.
Joe had a flapper the size of a baby's fist stuck in his nose and could feel it move when he would breath.
by blueknight1st March 25, 2009

by Camcan98 October 10, 2019

someone who opens his/her mouth to much and sez a lot of bullshit
someone who constantly lies about getting laid or something he/she didn't do just to fit in with friends/people
bean shooter
someone who constantly lies about getting laid or something he/she didn't do just to fit in with friends/people
bean shooter
by blthrskt July 24, 2008

a compulsive liar. they lie or " flap " about everything, to make themselves look cool. Johnny Dee is a flapper.
Johnny - Yo bro i was banging this bitch last night at my cousin john Gotti's house and then all of a sudden bro i dumped that bitch and banged out her mom.
Boy - You are a fucking flapper.
Boy - You are a fucking flapper.
by miSZkAiTLYNd0NATO September 6, 2008

by jackithsdfdwe November 8, 2007

by Steve Woodier November 14, 2007

by himura March 3, 2004
