The brief but agressive reciprocal hand job delivered but two older men before they leave the sauna, quickly finishing before any other guests arrive.
Grandpa wanted to get into the cabin with Grandma but quickly pulled a Monkey Whacker with Fred to keep all parties happy.
by BobbyScott June 25, 2016

by StudBandit1 December 20, 2017

by nshields August 6, 2008

Used to ejaculate and evacuate. Cums in many shapes and sizes (and colors) while also being attached to twins which can also cum in different shapes and sizes. Can be hairy, smooth and/or prickly like a cacti. Can also be used a derogatory term.
Kiki: bro my waiter was such a bitch, he made me pay for water
Chance: what a fuckin peenie whacker
Ex.2
Evan: what’s it mean when a girl laughs when I show her my peenie whacker?
Randy: means you got a massive member my manz
Evan: oh..
Chance: what a fuckin peenie whacker
Ex.2
Evan: what’s it mean when a girl laughs when I show her my peenie whacker?
Randy: means you got a massive member my manz
Evan: oh..
by Chance52 August 20, 2021

Someone who is not cool or up with the times,usually a 18-25 yr old male that is still a virgin but still talks about whacking it everynite cause he's clueless on how to nail some snatch!
by pipelayer24 May 31, 2013

A stick that every community should have that is capable of doing lasting damage to those who interfere with children
Isn't that the geezer who touched that young girl, yes it is , get the pedo whacker out. And go to town on his head
by mitch00uk March 27, 2015

Someone who has been caught masturbating in a fast food restaurant, in most cases using the free wifi to stream pornographic content.
John: Did you hear that Nick has a criminal record?
Tim: Yeah, he got arrested for indecent exposure in a McDonalds, He’s a Macca-whacker!
Tim: Yeah, he got arrested for indecent exposure in a McDonalds, He’s a Macca-whacker!
by JohBjelke November 25, 2020
