To shove someone's head by placing an open palm on the person's face and pushing. Similar to a slap, but without the speed and with the force directed forward rather than sideways; typically used to escalate a verbal argument just before coming to blows. It's the most offensive thing you can do to a person without causing them pain.
by Aaronomus November 25, 2013
Get the face-mashmug. by Peeniss March 6, 2019
Get the mash facesmug. by Zero 200 November 16, 2022
Get the Face Mashmug.