Getting a "free" ring tone for a phone, only to find out you're being charged for it. See jamster.
Jim: just got this awesome ringtone for my phone!
*one week later*
Jim: *checks phone bill* Holy shit! $50 for a simple ringtone? I thought it was free!
Rick: you got jamstered!
by andy whorehol November 07, 2013
v. intr. To ejaculate.
"I JAMSTERED ON HER FACE, FUCK YEAH"
by minigates November 23, 2008

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