1. An act of approval or saying hello, especially to an attractive girl while drinking.

2. (shoulder dipping) - doing a lot of drinking over the course of a day all while having a great time.
1. Dude I just staggered past those two hot girls and gave them a shoulder dip.
OR
You see those 2 girls on the other side of the bar? I'll shoulder dip to that!

2. I'm having an epic birthday BBQ next Saturday. You should come by, we will be shoulder dipping all day.
by shamus mcfly March 26, 2016
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