Any rear-end (butt, ass, or man hole, etc.) that has been fucked and ejaculated in. Fucked and filled.
by PHLbtfckBROS November 27, 2017

A full on, skillful blow job starting from flaccid & continuing all the way up to & including ejaculation without breaking contact between penis & mouth or even temporarily substituting a hand or sex toy.
My boyfriend has been particularly awesome lately, really considerate, thoughtful & loving; so I started tonight's bedroom gymnastics with a spunk-a-dunk.
by QueenNobEd February 22, 2018

The dweeb that hangs around when his mom makes him get off the nintendo and out of the house. Usually awkwardly to them self and puts a damper on the atmosphere in general. Commonly known to fuck bagels in-between online matches
by blubberbutt321 June 6, 2011

by willfinn April 30, 2022

by xbot7564 June 30, 2024

A Variation on the traditional bunk buddy sleeping arrangement in male bedrooms. Rather than have separate bunks for sleeping, the top bunk is used solely for masturbating with the bottom configured for top n' tail sleeping.
Looking Forward to going skiing next month, Karl has agreed to be my Spunk Buddy for the week. Saves fighting over who gets the bottom bunk !
by Slayer117 January 19, 2023
