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2.
Motor boating a female or females for an extended period of time. Usually after hours and with women who have large breasts.
Dude, I was Coast Guarding last night with those chicks from the party. I wish I had a life preserver...
by EdwinNoses November 05, 2012
 
1.
The act of finding and enlarging the clitoris for heightened sexual pleasure.
Usually done using a flexible straw, the clitoris is located and by sucking on the straw the clitoris becomes enlarged increasing and intensifying the orgasm for a woman.

The term " Coastguarding " comes from the "search and rescue " of the clitoris.
My bitch got me coastguarding last night before I nailed her.
by phil279 September 26, 2011