Wax my stick

A slang term used by surfers meaning to put a wax product on the surface of a surfboard to give better traction for their feet.
One such product is marketed as "Mr. Zog's Sex Wax - the best for your stick".

The term has a humorous double meaning of receiving oral sex (a blow job) as ones stick (penis) waxes (grows larger) from the attention.

I need to wax my stick first, then I'll join you in the water.