The act of smearing one's testicles in a fruity jam and placing them onto the eyes of an unsuspecting victim. A derivative of teabagging.
Using Rowntree's strawberry jam, I jamsacked Davey - he was not best pleased.
by JM March 19, 2004
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1. A group of deer.
2. An excessive amount of something.
A jamsack of deer ran rampant across the meadow.

The accountant had a jamsack of paperwork to complete before morning.
by stevilmetalhead May 16, 2011
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