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When a woman is not wearing a bra, she is said to have 'wild boobies'. Often this is present before a female goes to bed or after she has engaged in sexual intercourse. The verb freeboobing is a synonym for this phenomenon.
2 Girls at sleepover:

Girl 1: It's getting late, time for wild boobies.

Girl 2: Yeah this bra is uncomfortable, I'm about to have wild boobies as well.
by billcosbyssweaters December 02, 2011