Heavy Duty Equipment has two meanings:

1. the actual equipment used on farms, in warehouses, factories etc. that requires special training to use. This type of equipment should not be used under the influence of drugs or alcohol as it is dangerous.

2. a subtle reference to a man's penis size. In this case, it is suggesting that the man's cock is ENORMOUS and may hurt the female while penetrating during sex. Unlike the first meaning, it can be used under the influence of drugs and alcohol and sometimes produces better results.
Hannah: So how was he?
Stephanie: Well let's say he has some heavy duty equipment that I couldn't handle. I need an ice pack for my vag.
by derkkkkkkkka May 3, 2011
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