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1.
This phrase is popular in the Adirondacks. It can be used to describe a person exhibiting a great feat of strength, but it is most commonly used with a sarcastic connotation to describe a person lifting a lightweight object.
Example #1
Adirondacker 1: *lifts box of books*
Adirondacker 2: Woah, take it easy, Muscle Beach!

Example #2
Adirondacker 1: Instead of taking the fridge, I'll carry this pack of napkins.
Adirondacker 2: Don't strain yourself, Muscle Beach.
by safdsa October 04, 2006
 
2.
This phrase is popular in the Adirondacks. It can be used to describe a person exhibiting a great feat of strength, but it is most commonly used with a sarcastic connotation to describe a person lifting a lightweight object.
Example #1
Adirondacker 1: *lifts box of books*
Adirondacker 2: Woah, take it easy, Muscle Beach!

Example #2
Adirondacker 1: Instead of taking the fridge, I'll carry this pack of napkins.
Adirondacker 2: Don't strain yourself, Muscle Beach.
by safdsa October 04, 2006