foam finger 

An item that is normally worn at sporting events to show support for a team; but as Miley Cyrus has demonstrated, it can also be used to touch yourself or someone else sexually.

Miley Cyrus showed the world a whole new use for a foam finger at the 2013 MTV Music Video Awards by touching Robin Thicke's crotch and then her own with it. Now people are never going to look at foam fingers the same way again.

foam finger by Daedalus Suburbanus August 29, 2013

foam finger 

A treasured item that brings good luck to sporting events.

Raise up that foam finger!

foam finger by sammymac8 February 13, 2009

Foam Flinger 

A foam blaster/Nerf hobbyist

I need to meet some other foam flingers to organize nerf wars with

Foam Flinger by AmyIsGay August 4, 2023

Foamfingered 

Having a fist or finger(s) up one’s ass

Brandon Linder likes to be foamfingered late at night.

Foamfingered by Samsamsamantha March 16, 2022

Foamfingered 

To put a fist for finger(s) up one’s ass

Brandon Linder like to be Foamfingered

Foamfingered by Samsamsamantha March 16, 2022