When a male’s genitalia are visible through his pants. Not in the sense that they are see through though. In the sense that you can see the mass of the penis and ballsack, the best yam bags are just lumps of mass that one cannot discern penis from balls
Biff has a raging Yam Bag in his Adidas sweatpants.
by The Gosh Dang Bruin September 2, 2019
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The sack that hangs between the males legs and swings in the breeze.
Did you get to suck his big yam bags? Nothing like the feel of yam bags slapping your ass during a good porking.
by mARCYH September 11, 2006
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A man's scrotum, ball sack, nuts... you get the idea.
Then she played with my yam bag.

Ow! I think I sat onmy yam bag.
by 23 skiddoo April 1, 2005
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Yam bagging explains the phenomenon experienced when a man with low hangers is aggressively penetrating his partner in a manner that results in his testicles swinging and slapping hard enough to: be distinctly heard, distinctly felt by the partner and/or able to produce testicular discomfort to the penetrator.
by OMG303LOL February 8, 2017
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For Thanksgiving Dave Levine had a turkey's eye ball with some yam bags on the side
by Newms69 April 9, 2003
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Not to be confused with wordyambag/word, Two Yams in a Bag is wordTwo Fat Yams'/word brother, and cousin to wordHalf a Yam on the Floor/word. They are lesser-known relations to wordChow Yun Fat/word
Kung Fool 1: That fight scene between Two Yams in a Bag and Two Fat Yams was AWESOME!
Some Other Guy: Shut up.
by Noodlepie September 19, 2003
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