bikini wax

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A cosmetic procedure in which the pubic hair is partly or completely removed by waxing, especially in order not to extend beyond the edges of a swimsuit or other clothing.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The use of hot wax to remove pubic hair so that it may be easier to wear a bikini.