look up any word, like fleek:
 
1.
the act of using a soiled tampon, yours or another's (eww), as a calling card...usually flinging it against an object making it stick to said object
"That Teresa is one fucked up bitch. She was at Jenny's place, got pissed at her and ended up tampooning the living room wall. What a temper she has."
by Steven December 06, 2007
 
2.
The act of inserting a tampon into the orifice of a second individual. Does not necessarily imply consent or indicate which orifice.

Origin: tampon + poon + harpooning = tampooning
When my girlfriend is too drunk to change her maxipad it's time to go tampooning!
by Scrotash July 15, 2011