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A person who likes to lift almost every day. A Kruithoff is always partying and loves gym and physical activities. A Kruithoff's best friend is usually named "Sam" or "Drew". The acronym for Kruithoff is "MTK". Nobody knows why.
Wow, he's ripped! He's probably a Kruithoff.

That new kid is always hanging out with Sam and Drew. I think his last name is Kruithoff!
by jschwartz January 25, 2011
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